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.

Input: Consider Input: Question: Did the operation that Musicki contacted the Chetnik leader about actually take place? Passage:Mušicki 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 Mušicki remained in Slavonski Brod for several months after the conquest. He attempted to join the Ustaše Militia there, but was rejected. He went to Belgrade in mid-August, where he was received by Zbor leader Dimitrije Ljotić. On 6 October, Milan Nedić, the Prime Minister of the Axis-installed puppet Government of National Salvation, appointed Mušicki to lead the Serbian Volunteer Command (, SDK). Mušicki was involved in executing Serb civilians in the town of Čačak in December 1941. He and Milan Aćimović contacted Chetnik leader Draža Mihailović 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 Mušicki's loyalty. He was removed from command at the end of 1941 and imprisoned by the Germans, but was later freed at Nedić's intervention.
 Links: a. Royal Yugoslav Army b. Operation Mihailovic c. Dimitrije Ljotić d. Government of National Salvation

Output: b


Input: Consider Input: Question: What country did McGillivray return to before taking a trip to Scotland and England? Passage:McGillivray returned to Montreal in 1793 and then took a trip to Scotland and England. He was now a partner in McTavish, Frobisher & Co., who controlled the NWC. With John Gregory, he was sent to manage the company's huge depot at Grand Portage, stirring jealousy among some of the other partners. When Joseph Frobisher retired in 1798, McGillivray took his place. He set up an agency at New York City to get around the East India Company's monopoly enabling them to trade with China. He was closely involved too with the firm of McTavish, Fraser & Co., at London, managed by another relation of his uncle's, John Fraser. In 1803, he helped organize the move of the NWC's main depot from Grand Portage to Thunder Bay. All this time he was dealing with relations with the Hudson's Bay Company and the splinter XY Company that had broken away from the NWC, led by John Richardson.
 Links: a. Montreal b. Montreal c. North West Company d. New York City

Output: a


Input: Consider Input: Question: Did Squires perform more with Geraldo or Cyril Stapleton? Passage:When Squires became a professional singer she performed with big bands such as Ted Heath, Geraldo and Cyril Stapleton. She also sang with the smaller jazz bands of Max Harris, Kenny Baker and appeared in the BBC Festival of Jazz at the Royal Albert Hall with the Alan Clare band. She moved from Salisbury to London in 1948 at 20 years of age. In the 1950s and 60s she became a regular on the BBC Light Programme (now BBC Radio 2) on programmes like Melody Time and Workers' Playtime. Squires worked in the United States with Danny Kaye and Sammy Davis Jr., as well as appearing on the Johnny Carson Show. In 1994 Squires was part of the entertainment for Prince Edward's 30th birthday celebrations. During the 2012 Royal Diamond Jubilee year Squires undertook two countrywide tours to celebrate her own diamond jubilee in show business including two appearances at the Royal Festival Hall.
 Links: a. Cyril Stapleton b. Workers' Playtime (radio programme) c. Geraldo d. Prince Edward, Earl of Wessex


Output: c