Given the task definition, example input & output, solve the new input case.
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: Question: When did the operation during which the 704th dropped supplies to allied troops near Nijmegen begin? Passage: The group was occasionally diverted from strategic missions to carry out air support and interdiction missions. It supported Operation Overlord, the invasion of Normandy by attacking transportation targets, including bridges, along with airfields and strong points in France. On D Day, the squadron and the rest of the 446th Group led the first heavy bomber mission of the day. The 446th aided ground forces at Caen and Saint-Loduring July by hitting bridges, gun batteries, and enemy troops. During Operation Market Garden, the attempt to seize a bridgehead across the Rhine in the Netherlands, the 704th dropped supplies to allied troops near Nijmegen. It struck lines of communications during the Battle of the Bulge. During Operation Varsity in March 1945, it supplied ground and airborne troops near Wesel. The squadron flew its last combat mission on 25 April 1945 against Salzburg, Austria. The group had flown 273 missions and had lost 58 aircraft during the war,
. Links: a. Allies of World War II b. Wesel c. Operation Market Garden d. Air Support.
Output: c
The passage describes the 704th's actions during Operation Market Garden.

New input case for you: Question: Who was the captain of Hearts in 2010? Passage:McKay grew up supporting Heart of Midlothian (Hearts) and joined the club from local side Edinburgh City in July 2010, aged 17. During the 201011 season he gained some experience on loan at junior side Penicuik Athletic, winning their Players' Player of the Year award. McKay was included in the first team squad for the first time on 17 December 2011, when he was an unused substitute against Dunfermline. In May 2012, he signed a 12-month contract tying him to the club until at least the summer of 2013. In November McKay was loaned to Second Division side Stenhousemuir on a month's loan deal, he returned to Hearts after making four league appearances. In February 2013, McKay signed a further one-year extension committing him to the club until the summer of 2014. On 10 March 2013, McKay made his first team debut coming on as a 38th-minute substitute at Easter Road in a Scottish Premier League match against Hibernian, replacing the injured Fraser Mullen in a 00 draw. Throughout the pre-season of 201415 season McKay was given the opportunity to captain his boyhood club by head coach Robbie Neilson when club captain Danny Wilson was not on the field. McKay played less frequently during the 201415 season, as he was unable to break a defensive partnership of Wilson and Alim Ozturk.
Links: a. Hibernian F.C. b. Alim Ozturk c. Heart of Midlothian F.C. d. Robbie Neilson
Output:
c