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.

Ex Input:
Question: When was the author of JFK and the Unspeakable born? Passage:Jim Garrison said anti-Communist and anti-Castro extremists in the CIA plotted the assassination of Kennedy to maintain tension with the Soviet Union and Cuba, and to prevent a United States withdrawal from Vietnam. James Douglass wrote in JFK and the Unspeakable that the CIA, acting upon the orders of conspirators with the "military industrial complex", killed Kennedy and in the process set up Lee Harvey Oswald as a patsy. Like Garrison, Douglass stated that Kennedy was killed because he was turning away from the Cold War and pursuing paths of nuclear disarmament, rapprochement with Fidel Castro, and withdrawal from the war in Vietnam. Mark Lane — author of Rush to Judgment and Plausible Denial and the attorney who defended Liberty Lobby against a defamation suit brought by former CIA agent E. Howard Hunt — has been described as a leading proponent of the theory that the CIA was responsible for the assassination of Kennedy. Others who believe the CIA was involved include authors Anthony Summers and John M. Newman.
 Links: a. Vietnam War b. Vietnam War c. James W. Douglass d. Lee Harvey Oswald

Ex Output:
c


Ex Input:
Question: How many miles long is the river that Silvanus drove the Alamanni tribesmen back from? Passage:Silvanus was born in Gaul, the son of Bonitus, a Laetic Frankish general who had supported Constantine I in the civil war against Licinius. Like so many other Franks of his times, and like his father before him, he was a loyal and thoroughly romanized "barbarian" in the military service of the Empire. By AD 351, he held the rank of tribune and was one of the senior officers who defected to Emperor Constantius II at the Battle of Mursa Major, after initially supporting the usurper Magnentius. An able soldier, Silvanus was eventually promoted to the rank of Magister militum per Gallias, a crucial post, then in AD 352-353, Constantius personally entrusted him with the difficult task of driving the Alamanni tribesmen raiding and looting in Gaul back beyond the Rhine, and restoring the fast eroding Roman authority in the province. This Silvanus fulfilled partly by bribing the Alamanni chieftains with the taxes he had collected, partly by defeating the Alamanni in battle and partly by suppressing the local bagaudae insurrections flaring up again in central and northern Gaul.
 Links: a. Bonitus (magister militum) b. Constantine the Great c. Rhine d. Rhine

Ex Output:
c


Ex Input:
Question: Is the Houston Chronicle a bigger news paper than the Detroit Free Press, Newsday, and Knight Ridder? Passage:Friedman graduated from the University of Houston with a degree in philosophy in 1956. During his career, he wrote for the Houston Chronicle, the Detroit Free Press, Newsday, and for Knight Ridder newspapers. He won a 1963 Nieman Fellowship. His work landed him on the master list of Nixon political opponents. He was one member of a team that covered the 1967 Detroit riot for the Detroit Free Press. Next year they shared the Pulitzer Prize in Local General or Spot News Reporting (a predecessor of the Breaking News Pulitzer), citing "both the brilliance of its detailed spot news staff work and its swift and accurate investigation into the underlying causes of the tragedy." Friedman also taught national and foreign affairs reporting at the Columbia University Graduate School of Journalism for a year. In 1985, Friedman and his family moved to Edgewater, Maryland, where Friedman worked as a White House correspondent. Friedman began working for Newsday, although he left to spend five months in South Africa teaching journalists. After his return, Friedman wrote a weekly column called "Gray Matters" that covered issues affecting older people. After working there for more than twenty years, he quit Newsday in October 2009 over its decision to charge for its web content. He began publishing his column in November 2009 in Time Goes By, a blog.
 Links: a. South Africa b. Newsday c. Houston Chronicle d. White House press corps

Ex Output:

c