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 was older the year Culberson signed with the Dodgers, Dave Roberts or Boone Logan? Passage:Culberson was signed by the Dodgers in November 2015 and invited to spring training, where he impressed new Dodgers manager Dave Roberts. After an injury to Howie Kendrick opened a spot for him, Culberson made the Dodgers 2016 Opening Day roster. He was designated for assignment in July and optioned to the Oklahoma City Dodgers, then recalled a month later. Culberson ended the big club's final home game of the season with a walk-off home run against former Rockies teammate Boone Logan, clinching the Dodgers' fourth consecutive National League West division title. He played in 34 games for Los Angeles, hitting .284 and in 70 games for Oklahoma City, hitting .260. He had no hits in seven at-bats with two strikeouts in the 2016 National League Division Series. He was outrighted to the minors and removed from the 40-man roster on December 9, 2016. He was assigned to Oklahoma City to begin the season. He remained in the minors for the conclusion of the AAA season, hitting .250 in 108 games and returned to the majors with the Dodgers on September 4. In 15 games for the Dodgers, he hit .154 with two hits in 13 at-bats. When starting shortstop Corey Seager was left off of the 2017 NLCS roster because of a back injury, Culberson was added to the post-season roster. He appeared in all five games of the series, with five hits in 11 at-bats for a .455 average. In the 2017 World Series, Culberson had three hits in five at-bats, including his first career post-season home run, which he hit off Chris Devenski of the Houston Astros in the 11th inning of Game Two.
 Links: a. Dave Roberts (outfielder) b. Houston Astros c. Houston Astros d. Boone Logan
Example Output: d

Example Input: Question: What is the capacity of Derby's Pride Park stadium? Passage:As a result of Hull finishing in fourth place in the Championship they qualified for the Football League play-offs. In the play-off semi finals Hull played against fifth placed team Derby County over two legs. The first leg was held on 14 May 2016 at Derby's Pride Park. Hull's top scorer Abel Hernández was the first to score with a strike from 25 yards after half an hour. This was followed 10 minutes later with a shot by Moses Odubajo deflected in by defender Jason Shackell. Andrew Robertson completed the scoring with a late stoppage time goal to give Hull a 3–0 advantage going into the second leg at the KC Stadium on 17 May 2016. Derby got off to a great start with a goal from close range by Johnny Russell after 7 minutes. Their lead was doubled when a sliced ball by Andrew Robertson went into his own net 30 minutes later. Derby continued to press but Hull hung on to deny them any further scores. The match ended 2–0 to Derby, but Hull progressed 3–2 on aggregate, much to the relief of manager Steve Bruce who was in charge for the 200th time. The final, on 28 May 2016 at Wembley Stadium, was a local derby against Sheffield Wednesday who beat Brighton & Hove Albion 3–1 on aggregate in the other semi-final. Hull beat Sheffield Wednesday 1–0 in the final with the only goal coming from a 25-yard wonder strike by Mohamed Diamé in the 72nd minute. The Tigers made an immediate return to the top flight and it was Bruce's fourth promotion to the Premier League as manager.
 Links: a. Pride Park Stadium b. KCOM Stadium c. Wembley Stadium d. Pride Park Stadium
Example Output: a

Example Input: Question: What other people were members of the Helvetic Republic? Passage:The poet colleagues shared a sense of Sturm und Drang and empathy, calling it the "Bündner Nachtigall" (Graubünden nightingale). Salis-Seewis returned to Switzerland in 1791, living in Chur and marrying there, on 26 December 1793, the 22-year-old Ursina v. Pestalozzi (Chur 29 September 1771 - Malans 27 June 1835). They had two sons; Johann-Ulrich Dietegan (Comte) v. Salis-Seewis (1794–1844) and Johann-Jakob (Freiherr) v. Salis-Seewis (1800–1881). He had a lively involvement in the political changes in his homeland over the next years lively involved, endorsed the alliance of the Three Leagues of Switzerland to the new France, and the proclaimed Helvetic Republic. After the area was occupied by Austria in the following year, Salis-Seewis and his family had to flee to Zurich. There, he was appointed inspector general of the Helvetican troops. This activity brought him the nickname "poet general". He later went to Bern and received a place on the Court of cassation. When the Act of Mediation was issued by Napoleon Bonaparte in 1803, it became possible for Salis-Seewis to return to Graubünden. There he held several public offices until 1817, then he withdrew as Swiss federal colonel. His father had died two years before.
 Links: a. Helvetic Republic b. Sturm und Drang c. Sturm und Drang d. Helvetic Republic
Example Output:
a