You will be given a definition of a task first, then some input of the task.
In this task, you are given a context, a subject, a relation, and many options. Based on the context, from the options select the object entity that has the given relation with the subject. Answer with text (not indexes).

Context: The British Pacific Fleet (BPF) was a Royal Navy formation which saw action against Japan during the Second World War. The fleet was composed of British Commonwealth naval vessels. The BPF formally came into being on 22 November 1944. Its main base was at Sydney, Australia, with a forward base at Manus Island. One of the largest fleets ever assembled by the Royal Navy, by VJ Day it had four battleships and six fleet aircraft carriers, fifteen smaller aircraft carriers, eleven cruisers, and numerous smaller warships, submarines, and support vessels., John Keith Wells ( born February 5 , 1922 ) was a United States Marine during World War II who led one of the most decorated infantry platoons to come out of a single engagement and the first to raise a flag over the Japanese island of Iwo Jima during World War II , 3rd Platoon , 28th Marines , 5th Marine Division . This platoon was made famous for its attack on Mt . Suribachi and for raising the first flag on the summit ., The Battle of Iwo Jima (19 February  26 March 1945) was a major battle in which the United States Marine Corps landed on and eventually captured the island of Iwo Jima from the Japanese Imperial Army during World War II. The American invasion, designated Operation Detachment, had the goal of capturing the entire island, including the three Japanese-controlled airfields (including the South Field and the Central Field), to provide a staging area for attacks on the Japanese main islands. This five-week battle comprised some of the fiercest and bloodiest fighting of the War in the Pacific of World War II., Hiroshima is perhaps best known as the first city in history to be targeted by a nuclear weapon when the United States Army Air Forces (USAAF) dropped an atomic bomb on the city (and later on Nagasaki) at 8:15 a.m. on August 6, 1945, near the end of World War II., , known in English as Iwo Jima, is an island of the Japanese Volcano Islands chain south of the Ogasawara Islands and together with them form the Ogasawara Archipelago also known as the Bonin Islands. The island of 21 km (8 square miles) is south of mainland Tokyo and is administered as part of Ogasawara, one of the eight villages of Tokyo (though it is uninhabited). It is famous as the setting of the FebruaryMarch 1945 Battle of Iwo Jima involving the United States and a small number of elements of the British Pacific Fleet versus the Empire of Japan during World War II. The island grew in recognition in the west when the iconic photograph "Raising the Flag on Iwo Jima" was taken on Mount Suribachi, the highest point at 160 metres (528 feet), during the battle by Associated Press photographer Joe Rosenthal. The U.S. occupied Iwo Jima until 1968 when it was returned to Japan., Strategic bombing is a military strategy used in a total war with the goal of defeating the enemy by destroying its morale or its economic ability to produce and transport materiel to the theatres of military operations, or both. It is a systematically organized and executed attack from the air which can utilize strategic bombers, long- or medium-range missiles, or nuclear-armed fighter-bomber aircraft to attack targets deemed vital to the enemy's war-making capability., World War II (often abbreviated to WWII or WW2), also known as the Second World War, was a global war that lasted from 1939 to 1945, although related conflicts began earlier. It involved the vast majority of the world's nationsincluding all of the great powerseventually forming two opposing military alliances: the Allies and the Axis. It was the most widespread war in history, and directly involved more than 100 million people from over 30 countries. In a state of "total war", the major participants threw their entire economic, industrial, and scientific capabilities behind the war effort, erasing the distinction between civilian and military resources. Marked by mass deaths of civilians, including the Holocaust (in which approximately 11 million people were killed) and the strategic bombing of industrial and population centres (in which approximately one million were killed, and which included the atomic bombings of Hiroshima and Nagasaki), it resulted in an estimated 50 million to 85 million fatalities. These made World War II the deadliest conflict in human history., Subject: john keith wells, Relation: military_branch, Options: (A) aircraft (B) navy (C) united states army (D) united states army air forces (E) united states marine corps
Output:
united states marine corps