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: Which of the teams Boswell played for was the oldest? Passage:Born in Chester, Boswell joined local football club Chester F.C. upon leaving school, initially as an amateur. He remained with the club until the outbreak of the Second World War, but never made it to the club's first team. During the war he served with the Royal Engineers and also made appearances as a guest player for Sheffield Wednesday during unofficial wartime competitions. He was later posted to Barton Stacey in Hampshire, where he helped his unit's football team win a major Army Football Association trophy. Upon leaving the army in 1946 he joined Gillingham, who at the time were playing in the Kent League. Gillingham manager Archie Clark also signed four other players who had served with Boswell at Barton Stacey and played alongside him in the unit football team, namely Jackie Briggs, George Forrester, Hughie Russell and Vic Hole.
 Links: a. Chester City F.C. b. Army Football Association c. Hampshire d. Kent Football League (1894–1959)
Example Output: a

Example Input: Question: How old was Conrad Susa when The Dangerous Liaisons first premiered? Passage:The Dangerous Liaisons is an opera in two acts and eight scenes, with music by Conrad Susa to an English libretto by Philip Littell. It is based on the novel Les Liaisons dangereuses by Pierre Choderlos de Laclos. The opera has set numbers with recitative and spoken dialog. It is set in France in the 18th century. The opera received its first performance by the San Francisco Opera on 10 September 1994, with stage direction by Colin Graham and Donald Runnicles as the conductor. The world-premiere cast included Thomas Hampson as Valmont, Frederica von Stade as Merteuil, David Hobson as Chevalier de Danceny, Renée Fleming as Tourvel and Mary Mills as Cécile de Volanges. The opera was performed at Washington Opera in March 1998. It was also aired on the American PBS television network's Great Performances, a video recording of which was also made. Albany Records released an audio recording of a performance by Manhattan School of Music Opera Theater in 2016.
 Links: a. Conrad Susa b. Thomas Hampson c. Conrad Susa d. Mary Mills (soprano)
Example Output: a

Example Input: Question: How hold was his co-driver when he was in a porsche? Passage:Olson made one CART World Series start in 1983 at Road America. In 1984 he drove in three Can-Am races, an IMSA GT Championship race and two World Endurance Championship races, including the 1984 24 Hours of Le Mans where he was caught up in the debris field of his Aston Martin teammate John Sheldon's crash that killed a track worker. In 1985 he won three races with Dyson Racing in IMSA Camel GTP, the team's first, in a Porsche 962. 1986 saw Olson continue in IMSA GTP with Dyson and Preston Henn fielding his entries. That year he also competed in the 1986 24 Hours of Le Mans, co-driving a Rothmans Porsche factory 962 with Vern Schuppan. Olson was away from racing after that until 1989 when he returned with the All American Racers Toyota 88C factory team in IMSA GTP. He won two poles and finished ninth in points. 1990 would be his final year of professional racing as he finished tenth in GTP points with three poles for All American Racers in their Eagle HF89.
 Links: a. Dyson Racing b. Vern Schuppan c. Dyson Racing d. All American Racers
Example Output:
b