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: Did the operation that Musicki contacted the Chetnik leader about actually take place? Passage:Musicki was stationed in Slavonski Brod at the time of the Axis invasion of Yugoslavia in April 1941 and served as the Royal Yugoslav Army commander responsible for the railroad between Belgrade and Zagreb in the rank of colonel. He demonstrated his support for the Germans by helping their forces during the invasion. Yugoslavia was quickly conquered by the Axis powers and Musicki remained in Slavonski Brod for several months after the conquest. He attempted to join the Ustase Militia there, but was rejected. He went to Belgrade in mid-August, where he was received by Zbor leader Dimitrije Ljotic. On 6 October, Milan Nedic, the Prime Minister of the Axis-installed puppet Government of National Salvation, appointed Musicki to lead the Serbian Volunteer Command (, SDK). Musicki was involved in executing Serb civilians in the town of Cacak in December 1941. He and Milan Acimovic contacted Chetnik leader Draza Mihailovic on 5 December, possibly in an effort to warn him in advance of the assault the Germans had planned, codenamed Operation Mihailovic. This action prompted the Germans to question Musicki's loyalty. He was removed from command at the end of 1941 and imprisoned by the Germans, but was later freed at Nedic's intervention.
Links: a. Royal Yugoslav Army b. Operation Mihailovic c. Dimitrije Ljotic d. Government of National Salvation

Ex Output:
b

Ex Input:
Question: How long had the university been teaching students at the time Lange was expelled from it? Passage:Lange was born in Warsaw into the patriotic Jewish family of Henryk Lange (18151884) and Zofia nee Eisenbaum (18321897). His father took part in the November Uprising against the Russian Partition of Poland. He was an admirerer of Romantic literature and its ideals. Antoni Lange enrolled at Warsaw University but around 1880 he was expelled for his patriotic activity by the Tsarist namiestnik Apuchtin who ruled the university at that time. He supported himself financially as a tutor but also published poetry under the pen-names Napierski and Antoni Wrzesien. He decided to study in Paris where he encountered new trends in literature, philosophy and art. In France he became familiar with the theories of Jean Martin Charcot, as well as Spiritualism, parapsychology, the philosophy of Arthur Schopenhauer and Friedrich Nietzsche, oriental religions, European and Eastern literature and modern literary criticism. He took part in the literary meetings of Stephane Mallarme.
Links: a. Romanticism in Poland b. November Uprising c. University of Warsaw d. Spiritualism

Ex Output:
c

Ex Input:
Question: Which team had the better record - the team Donawa missed playing against due to an injury, or the final in which he scored the winning goal? Passage:Donawa came through the youth setup at Somerset Trojans, playing in the Player Development League and the U-14 KO Cup. He made his senior debut for Somerset on 2 January 2014, appearing off the bench in the Friendship Trophy final as the Trojans claimed a 32 victory against Hamilton Parish. He continued to appear for Somerset for four more seasons, albeit infrequently as he could only play for the club while on breaks from school. Donawa returned to Somerset during the 201415 season, playing against Robin Hood in the Friendship Trophy and helping the club to claim their first Bermudian Premier Division title in 22 years. He was unable to appear in the title-deciding victory over Southampton Rangers, however, after suffering a sprained ankle while on international duty. Donawa helped the club to another championship in 201516, appearing in the Friendship Trophy while on holiday from school. He scored the final goal of a 30 victory against Hamilton Parish in the semifinals, giving Somerset the chance to win their eleventh Friendship Trophy after the new year. Against PHC Zebras in the final, Donawa scored the winning goal just before halftime as the Trojans claimed a 21 victory. On 12 December 2016, Donawa scored his first career Bermudian Premier League goal. His eighth-minute strike, off an assist from Hubert Buttersfield, helped Somerset claim a 22 draw against Devonshire Cougars. His second league goal had to wait until the 201718 season, coming in a 31 victory over X-Roads Warriors on 11 December 2017. He also added a goal in the semi-finals of the Expansion League Festive Tournament later that month and played the full 90 minutes in a 33 draw with North Village Rams on 17 March that clinched Premier Division safety for Somerset. The match against North Village would mark Donawa's final game with the club, as he was unable to participate during the 201819 season due to injury and a lack of international clearance.
Links: a. Southampton Rangers S.C. b. 201819 Bermudian Premier Division c. North Village Rams d. Hamilton Parish F.C.

Ex Output:
a