In this task, you're given a question, a context passage, and four options which are terms from the passage. After reading a passage, you will get a brief understanding of the terms. Your job is to determine by searching and reading further information of which term you can answer the question. Indicate your choice as 'a', 'b', 'c', or 'd'. If you think more than one option is plausible, choose the more probable option to help you answer the question.

Example Input: Question: Who founded the program Golay led between 1970 and 1976? Passage:Golay was born in Windsor, Missouri, on July 2, 1915, and served in the United States Navy during World War II. After his military service, Golay obtained a doctorate in economics from the University of Chicago in 1951, and worked for the Federal Reserve Board until 1953, when he joined the Cornell University as an assistant professor of economics and Asian studies. In 1960, Golay received a Guggenheim fellowship. He was named chair of the Cornell Department of Economics in 1963, and left the position in 1967. He taught at SOAS, University of London as a visiting professor on a Fulbright grant from 1965 to 1966. Between 1970 and 1976, Golay led the Cornell Southeast Asia Program. Golay was a visiting professor at the University of the Philippines from 1973 to 1974 as a recipient of a Rockefeller Foundation grant. He retired from Cornell in 1981, and served as president of the Association for Asian Studies in 1985. Golay died on August 31, 1990, at the veterans' hospital in Oxford, New York.
 Links: a. SOAS University of London b. Federal Reserve Board of Governors c. Cornell Southeast Asia Program d. Cornell Southeast Asia Program
Example Output: c

Example Input: Question: How many years after Wish You Were Here was released was The Wall released? Passage:Storm Thorgerson, who had done the majority of album covers for Pink Floyd, did the Echoes art which features recursive windows in an infinite regression as a nod to his own cover for 1969's Ummagumma, and the objects on each landscape refer to the Pink Floyd discography. For instance, there's the man on fire from Wish You Were Here, another wearing the Delicate Sound of Thunder lightbulb suit, dolls of the Atom Heart Mother cow and the Animals pig, a bike and both a brick wall and the hammers from The Wall. Eventually Thorgerson opted to make two images, with another used for the back cover. To create the idea on a photograph, various walls - which had varied measurements and angles to ensure that "nothing seemed to fit other than by eye through the lens." - were built and put in a country landscape in Sussex. Actors, props and fittings were set in and between those walls. The original design was one of two sketches submitted for Dream Theater's 1997 album Falling into Infinity, with the original being framed and hanging in the home of former Dream Theater drummer Mike Portnoy and is pointed out by Portnoy in his Hudson Music instructional drum DVD In Constant Motion.
 Links: a. Wish You Were Here (Pink Floyd album) b. Sussex c. Ummagumma d. Atom Heart Mother
Example Output: a

Example Input: Question: When did the place that inspired David Cohen to write "Lisa the Skeptic" first open? Passage:"Lisa the Skeptic" is the eighth episode of The Simpsons' ninth season. It first aired on the Fox network in the United States on November 23, 1997. On an archaeological dig with her class, Lisa discovers a skeleton that resembles an angel. All of the townspeople believe that the skeleton actually came from an angel, but skeptical Lisa attempts to persuade them that there must be a rational scientific explanation. The episode's writer, David X. Cohen, developed the idea after visiting the American Museum of Natural History, and decided to loosely parallel themes from the Scopes Monkey Trial. The episode also makes allusions to actual hoaxes, such as the Cardiff Giant. 
 Links: a. Skepticism b. American Museum of Natural History c. Angel d. Excavation (archaeology)
Example Output:
b