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: How old was the Cardinals right fielder when he retired? Passage:The new season brought a Cardinals team that was much changed from the one that went 100-62 in 2005 but fell to the Houston Astros in the NLCS. Starting pitcher Matt Morris, second baseman Mark Grudzielanek, left fielder Reggie Sanders, and relief pitcher Julián Tavárez left the team via free agency. Relief pitcher Ray King was traded to Colorado. Right fielder Larry Walker retired. Brought in to replace the departed Cardinals were right fielder Juan Encarnación, starting pitcher Sidney Ponson, relief pitchers Braden Looper and Ricardo Rincón, all via free agency, and second baseman Aaron Miles, acquired in the Ray King trade. Left field was left unsettled in the offseason and would remain so all year, with no player getting more than one-third of the playing time at that position.
 Links: a. Julián Tavárez b. Larry Walker c. Reggie Sanders d. Larry Walker

Ex Output:
b


Ex Input:
Question: Who is the CEO of the airline that scheduled flights to several Florida cities and Detroit? Passage:In later years, Continental Express continued to serve the airport with nonstop regional jet flights to Cleveland while Continental Connection was operating nonstop turboprop flights to Albany, NY; however, both services ended in 2005. Spirit Airlines scheduled flights to several Florida cities and Detroit, before moving to LaGuardia Airport in 2001; in May 2008 the airline resumed service to Fort Lauderdale from MacArthur only to drop it soon after. Delta Express, which had nonstops to Orlando and Fort Lauderdale, dropped MacArthur Airport in 2003 after a decline in traffic. Delta Connection regional jet service to Atlanta flown by Atlantic Southeast Airlines (ASA) on behalf of Delta Air Lines ended on May 1, 2008 following a mid-April announcement that Delta and Northwest Airlines were planning to merge – a move that led to changes for the merged airline.
 Links: a. Detroit b. Atlanta c. Spirit Airlines d. Fort Lauderdale, Florida

Ex Output:
c


Ex Input:
Question: Which team involved in Silva's Primeira Liga debut has a longer history? Passage:He made his Primeira Liga debut for FC Porto on 10 August 2019 in a 2–1 loss at Gil Vicente, playing the final 11 minutes in place of Otavinho; at 17 years and 22 days, he surpassed Bruno Gama as the youngest league player in the club's history. On 19 September against BSC Young Boys in the UEFA Europa League group stage, he became the club's youngest player in European competitions, beating Rúben Neves. Six days later, he became the club's youngest starter in any competition when he lined up against C.D. Santa Clara in the Taça da Liga group stage, beating a record held by Serafim Pereira since 1960. 
 Links: a. Gil Vicente F.C. b. FC Porto c. UEFA Europa League d. Serafim Pereira

Ex Output:

b