Please answer the following question: Information:  - The Chrysler 300 is a full-size luxury sedan produced by Chrysler. Designed by Ralph Gilles in 2001, and first shown at the 2003 New York Auto Show as a concept car, sales in the United States began in April 2004. The 300 was Chrysler's first rear-wheel-drive full-sized sedan since the discontinuation of the Chrysler Newport of 1981. The SRT-8 model was intended as the high-performance version.  - The Chrysler 300 `` letter series '' are high - performance personal luxury cars that were built by Chrysler in the U.S. from 1955 to 1965 . After the initial year , which was named 300 - C , the 1956 cars were designated 300B . Successive model years given the next letter of the alphabet as a suffix ( skipping `` i '' ) , reaching the 300L by 1965 , after which the model was dropped . The 300 `` letter series '' cars were among the vehicles that focused on performance built by domestic U.S. manufacturers after World War II , and thus can be considered one of the muscle car 's ancestors , though full - sized and more expensive . The automaker began using the 300 designations again for performance - luxury sedans , using the 300M nameplate from 1999 to 2004 , and expanding the 300 series with a new V8 - powered 300C , the top model of a relaunched Chrysler 300 line , a new rear - wheel drive car launched in 2004 for the 2005 model year . Unlike the first `` letter series '' series , the successive variants do not feature standard engines producing at least 300 hp ( 220 kW ) , except for Chrysler 's current top - line 300C models .  - Ralph Victor Gilles (born 14 January 1970) is a Canadian-American automobile designer and executive. Gilles was the President and CEO of Chrysler's SRT brand and Senior Vice President of Design at Chrysler before being promoted to Head of Design for Fiat Chrysler Automobiles in April 2015.  - A concept car (also known as concept vehicle, show vehicle or prototype) is a car made to showcase new styling and/or new technology. They are often shown at motor shows to gauge customer reaction to new and radical designs which may or may not be mass-produced. General Motors designer Harley Earl is generally credited with inventing the concept car, and did much to popularize it through its traveling Motorama shows of the 1950s.    After reading the paragraphs above, we are interested in knowing the entity with which 'chrysler 300 letter series' exhibits the relationship of 'manufacturer'. Find the answer from the choices below.  Choices: - chrysler  - fiat  - general motors
A:
fiat