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: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

Output: b

Input: Consider Input: Question: What car did Sommer drive in the Vanderbilt Cup? Passage:Sommer was born in Mouzon, in the Ardennes departement of France, into a wealthy Sedan carpet-making family. His father, Roger Sommer, broke the Wright Brothers' record for the longest flight in 1909. It was not until 1931 that Raymond started to display daredevil tendencies of his own, entering motor races in a privateer Chrysler Imperial. The following year, he won the 24 Hours of Le Mans race, despite having to drive over 20 hours solo after his teammate, Luigi Chinetti, retired ill. During the 1930s, Sommer was to dominate the French endurance classic, winning again in 1933 driving an Alfa Romeo alongside Tazio Nuvolari. He also led every race until 1938, only to suffer a mechanical failure, once when 12 laps in the lead. Sommer traveled to Long Island, New York, to compete in the 1936 Vanderbilt Cup where he finished fourth behind the winner, Nuvolari.
Links: a. Luigi Chinetti b. Long Island c. Tazio Nuvolari d. Vanderbilt Cup

Output: d

Input: Consider Input: Question: Did Panos spend more years in schooling in Feltre or in Vicenza? Passage:Her artisan parents lost their jobs due to the industrialization in the region and so were forced to emigrate to the United States of America in 1902. Panas was left in the care of her paternal priest uncle Angelo who was a chaplain in Asiago and later the archpriest for Enego and who was living with his nurse sister Maria. Her schooling began under the Canossians in Feltre and later continued in Vicenza and on 5 August 1906 she made her First Communion. Panas remained in her uncle's care (receiving her initial education and religious formation from him) until her parents returned in 1910. Her parents returned with two new children Maximina and Rosa who had been born in the United States. In 1910 she moved to the Saint Alvise college in Venice and also attended the Nicolo Tommaseo Institute there before she graduated in 1913. It was following her graduation that she began teaching in the Conetta neighborhood of Cona close to Venice and it was there in 1914 that she met Father Luigi Fritz who would begin serving as her confidante and spiritual director until the end of their lives (which occurred within weeks of each other). It was also around this stage that Panas began keeping a journal and made the resolution that she would never write unless it was about or for Jesus Christ.
Links: a. Canossians b. Feltre c. Archpriest d. Archpriest
Output: a