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: Of the two people who reached the finals on December 13th who has released the most albums? Passage:In October 2013, it was reported that Cowell may return to the UK version of The X Factor for series 11 in the place of Gary Barlow, and on 7 February 2014, his return was officially confirmed. This resulted in the cancellation of the US version after three seasons by Fox. He joined judges Louis Walsh, Cheryl Fernandez-Versini, and new judge, former Spice Girls member Mel B, who replaced Nicole Scherzinger. For his eighth series, he was given the Over 25s category. On 13 December, Ben Haenow and Fleur East reached the final two, which meant that Cowell was the winning mentor for the first time since series 3 in 2006, when he had both Leona Lewis and Ray Quinn in the final. Haenow became the eleventh winner on 14 December. In March 2015, it was announced that Cowell would return to the X Factor for its twelfth series along with veteran judge Cheryl Fernandez-Versini, and newcomers Rita Ora and BBC Radio 1 DJ Nick Grimshaw.
Links: a. Ben Haenow b. Rita Ora c. Rita Ora d. Nick Grimshaw

Ex Output:
a

Ex Input:
Question: Who was the first to receive the award Hampton was given for his military service? Passage:James Hampton was born in 1909 in Elloree, South Carolina as one of four children to James Sr. and Sarah (Johnson) Hampton. His father, who had abandoned the family, was a gospel singer and a traveling Baptist preacher but also a known criminal who had worked on chain gangs. In 1928, Hampton moved to Washington, D.C. and shared an apartment with his older brother Lee. Hampton worked as a short-order cook until 1943 when he was drafted into the United States Army Air Forces. He served with the 385th Aviation Squadron in Texas, Hawaii, and in the jungles of Saipan and Guam. The segregated unit was noncombatant and duties included carpentry and maintenance of airstrips. Hampton built a small shrine-like object during his time in Guam which he incorporated into his larger artwork later. He was awarded the Bronze Star, honorably discharged in 1945 and returned to Washington, D.C. In 1946, Hampton was hired by the General Services Administration as a janitor and worked there until his death.
Links: a. Chain gang b. Racial segregation c. Bronze Star Medal d. Hawaii

Ex Output:
c

Ex Input:
Question: How long did the German invasion of Soviet Union that Hannig participated in last? Passage:Born in 1921 in Frankenstein, Lower Silesia, Hannig joined the military service in the Luftwaffe as a Fahnenjunker (officer cadet) in October 1939. He was posted to the 6./Jagdgeschwader 54 "Grunherz" (JG 5454th fighter wing) in early 1941. His brother, Walter Hannig, received the German Cross in Gold () on 28 April 1943 as an observer with Aufklarungsgruppe (reconnaissance group) 4.(F)/14 of the Luftwaffe. Horst Hannig claimed his first aerial victory, a Tupolev SB-2, on the first day of Operation Barbarossa, the German invasion of the Soviet Union on 22 June 1941. He achieved his first 30 victories up to November 1941. On 9 May 1942, Leutnant (second Lieutenant) Hannig was awarded the Knight's Cross of the Iron Cross () having flown over 200 operations and claiming 48 victories. He and Leutnant Hans Beiwenger received the Knight's Cross from General der Flieger Helmuth Forster at Siverskaya. On 21 July 1942 he claimed his 54th victory, a Petlyakov Pe-2 reconnaissance aircraft, near Lake Ilmen. It was JG54 2,500th aerial victory.
Links: a. Petlyakov Pe-2 b. Lower Silesia c. Operation Barbarossa d. Jagdgeschwader 54

Ex Output:
c