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 won the World Cup where the Costa Rican team had a prominent performance? Passage:Since the late 1980s, the team has continuously been visible as a solidly competitive side, with a prominent performance in the 1990 FIFA World Cup in Italy, making it to the knockout stage in their debut after finishing second in their group during the first phase, below Brazil. They also managed to qualify for the 2002 and 2006 FIFA World Cups. In 2014, Costa Rica made their best performance in history by finishing first in their group that consisted of three former World Cup champions: Uruguay, Italy, and England. During the Round of 16 they defeated Greece 5–3 via a penalty shootout after a 1–1 draw. Moreover, during the match against a much better team, Navas saved more than 15 shots due to the Costa Rican very weak defense. The match was characterized as "Navas vs Greece". They reached the quarterfinals for the very first time as the Ticos were defeated by the Netherlands also in a penalty shootout (3–4) after a scoreless draw on 5 July. Their 2018 World Cup campaign ended in a 4th place group stage exit with their only point coming from a 2-2 draw vs Switzerland.
 Links: a. 2006 FIFA World Cup b. 1990 FIFA World Cup c. 2006 FIFA World Cup d. Keylor Navas
Example Output: b

Example Input: Question: How many matches did Nakagawa play for the Yokohama Marinos in 1996? Passage:Nakagawa was born in Osaka Prefecture on August 26, 1969. After graduating from Kokushikan University, he joined Yokohama Flügels in 1992. However he could hardly play in the match behind Atsuhiko Mori. In June 1995, he moved to rival club in Yokohama, Yokohama Marinos. In 1996, he played many matches when regular goalkeeper Yoshikatsu Kawaguchi let the club for 1996 Summer Olympics and injury. In 1998, he moved to Kyoto Purple Sanga. However he could hardly play in the match behind Shigetatsu Matsunaga. In March 2000, he moved to Nagoya Grampus Eight on loan. In 2001, he returned to Purple Sanga was relegated to J2 League. From June, he became a regular goalkeeper and the club returned to J1 League in a season. However he could hardly play in the match in 2002 season and retired end of 2002 season.
 Links: a. Atsuhiko Mori b. Football at the 1996 Summer Olympics c. Yoshikatsu Kawaguchi d. Yokohama F. Marinos
Example Output: d

Example Input: Question: What was the home stadium for the club Mirallas joined in 2012? Passage:In August 2012, Mirallas joined Premier League club Everton for a reported fee of £6 million. He made his debut as a second-half substitute during a 3–1 league win over Aston Villa at Villa Park in which he had a headed goal disallowed due to it being ruled offside. In his first start four days later, Mirallas scored twice and provided two assists as Everton won 5–0 against Leyton Orient in the second round of the League Cup. He scored his first league goal on 22 September 2012, in a 3–0 away win against Swansea City after heading in his initial effort which rebounded off the underside of the bar. Mirallas suffered a number of injuries which limited his number of appearances during the middle part of the season. He made a number of brief cameos, notably against Tottenham Hotspur in December. Mirallas' next goal came against Oldham Athletic in a 3–1 win on 26 February 2013 in the fifth round of the FA Cup. He then scored again, scoring his second league goal of the season against Reading in a 3–1 win on 2 March 2013. He scored his first brace in David Moyes' last home game in charge of Everton in a 2–0 win against West Ham United.
 Links: a. Oldham Athletic A.F.C. b. David Moyes c. Everton F.C. d. Tottenham Hotspur F.C.
Example Output:
c