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: Is the Philippine Sea part of the Pacific Ocean? Passage:Nueva Camarines is the name of a proposed new province of the Philippines to be created out of Camarines Sur in the Bicol Region of the island of Luzon. The proposed province would border Camarines Sur to the west, the Philippine Sea to the north, Albay to the south, and to the east the island province of Catanduanes across Maqueda Channel. Its capital is expected to be Tigaon if the bill is passed. House Bill 4820 which would create the province passed the House of Representatives of the Philippines with 229 votes in favor to one against in 2011 and is now under consideration by the Senate of the Philippines. However, at the end of 15th Congress, it failed to pass to the Senate. In the 16th Congress under then Representative Felix William Fuentebella, a bill is yet to be filed to repropose the creation of the province, due to lack of support from fellow Camarines Sur Representatives Maria Leonor Robredo and Salvio Fortuno. In the 18th congress under new Representative Arnulf Bryan Fuentebella.
 Links: a. Philippine Sea b. 15th Congress of the Philippines c. 15th Congress of the Philippines d. Philippine Sea
Example Output: a

Example Input: Question: Which ground did the Liverpool Football Club play at longer, Anfield or Goodison Park? Passage:Liverpool Football Club is an English association football club based in Liverpool, Merseyside, which competes in the top tier of English football, for the 2019–20 season. The club was formed in 1892 following a disagreement between the board of Everton and club president John Houlding, who owned the club's ground, Anfield. The dispute over rent resulted in Everton leaving Anfield for Goodison Park, which left Houlding with an empty stadium. Not content for his ground to lay idle, he created his own club: Liverpool. Liverpool joined the Lancashire League on their foundation before the 1892–93 season. They ended their inaugural season as league champions, and were elected to The Football League soon afterwards. The club remained in The Football League until 1992, when its First Division was superseded as English football's top level by the newly formed Premier League.
 Links: a. Goodison Park b. Anfield c. Liverpool F.C. d. Association football
Example Output: a

Example Input: Question: Which of the two men who served as head coach during the 2015-16 season is younger? Passage:The 2015–16 Wisconsin Badgers men's basketball team represented the University of Wisconsin–Madison in the 2015–16 NCAA Division I men's basketball season. This was Bo Ryan's 15th season as head coach at Wisconsin, before he resigned 12 games into the season. On December 15, 2015, Ryan announced he would retire effective immediately leaving associate head coach Greg Gard as interim head coach. The team played their home games at the Kohl Center and were members of the Big Ten Conference. They finished the season 22–13, 12–6 in Big Ten play to finish in a four-way tie for third place in conference. Shortly after the regular season, Greg Gard had the interim tag removed as he was announced as the permanent head coach. The Badgers were upset by Nebraska in the second round of the Big Ten Tournament. They received an at-large bid to the NCAA Tournament, their 18th straight appearance in the Tournament. They defeated Pittsburgh and Xavier to advance to the Sweet Sixteen for the third consecutive year. In the Sweet Sixteen, they lost to Notre Dame.
 Links: a. Bo Ryan b. Bo Ryan c. 2015–16 Big Ten Conference men's basketball season d. 2015–16 Notre Dame Fighting Irish men's basketball team
Example Output:
a