Detailed Instructions: 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).
Problem:Context: The Rio Grande Valley (RGV), The Valley, is an area located in the southernmost tip of South Texas. It lies along the northern bank of the Rio Grande river, which separates Mexico from the United States. The four-county region, consisting of Hidalgo, Cameron, Willacy, and Starr Counties, is one of the fastest growing places in all of the United States. From having about 325,000 people in 1969, to today a population over 1,300,000 in 2014.
Some of the biggest cities in the region are; Brownsville, McAllen, Mission, Edinburg, Pharr, Weslaco, Harlingen, Rio Grande City, and Hidalgo., The Rio Grande (or  or simply Río Bravo) is one of the principal rivers in the southwest United States and northern Mexico (the other being the Colorado River). The Rio Grande begins in south-central Colorado in the United States and flows to the Gulf of Mexico. Along the way, it forms part of the MexicoUnited States border. According to the International Boundary and Water Commission, its total length was in the late 1980s, though course shifts occasionally result in length changes. Depending on how it is measured, the Rio Grande is the fourth- or fifth-longest river system in North America., XHRYS ( branded as Hits FM ) is a Spanish - language FM radio station that serves the Reynosa , Tamaulipas Rio Grande Valley border area ., A radio station is a set of equipment necessary to carry on communication via radio waves. Generally, it is a receiver or transmitter, an antenna, and some smaller additional equipment necessary to operate them. Radio stations play a vital role in communication technology as they are heavily relied on to transfer data and information across the world., South Texas is a region of the U.S. state of Texas that lies roughly south of -- and sometimes including -- San Antonio. The southern and western boundary is the Rio Grande, and to the east it is the Gulf of Mexico. The population of this region is about 4.67 million according to the 2013 census estimates. The southern portion of this region is often referred to as the Rio Grande Valley. The eastern portion along the Gulf of Mexico is also referred to as the Coastal Bend., Subject: xhrys-fm, Relation: country, Options: (A) mexico (B) united states (C) world
Solution:
mexico