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 Input: Question: Where was the person whose guard Yermolov served in 1807 born? Passage:His own military genius blossomed during the Napoleonic Wars. During the 1805 Campaign, Yermolov served in the rear and advance guards and distinguished himself at Amstetten and Austerlitz. For his actions, he was promoted to colonel on 16July 1806. The following year, he participated in the campaign in Poland, serving in Prince Bagration's advance guard. He distinguished himself commanding an artillery company in numerous rearguard actions during the retreat to Landsberg as well as in the Battle of Eylau. In June 1807, Yermolov commanded horse artillery company in the actions at Guttstadt, Deppen, Heilsberg and Friedland, being awarded the Order of St. George (3rd class, 7 September 1807). He was promoted to major general on 28 March 1808 and was appointed inspector of horse artillery companies. In early 1809, he inspected artillery companies of the Army of the Danube. Although his division took part in the 1809 campaign against Austria, Yermolov commanded the reserves in Volhynia and Podolsk gubernias, where he remained for the next two years. In 1811, he took command of the guard artillery company and in 1812, became the Chief of Staff of the 1st Western Army.
Links: a. Volhynia b. Order of St. George c. Pyotr Bagration d. Battle of Friedland
Example Output: c

Example Input: Question: Did "Don't Let Me Down" win any awards? Passage:Hardesty's solo recordings began in 1957; the first two, organized by the guitarist Mickey Baker, were never released are not known to exist. Twelve songs were recorded on January 15, 1958, at Cosimo Matassa's studio in New Orleans for Wing Records, a subsidiary of Mercury Records, but were never released until the 2012 CD The Domino Effect was issued worldwide by Ace Records (United Kingdom). The first time that Hardesty's name appeared on a single was with the Canadian vocal quartet the Diamonds, "Don't Let Me Down" (also known as "Chick-Lets"), which was recorded on March 4, 1958, and released the following month as Mercury 71291. In 1959, Hardesty recorded four tracks in New York City with Hank Jones. Two were released as a single on Paoli, the only release from this label; they were also released shortly after by Mutual, both labels having connections to Philadelphia. The Mutual release was listed on Philadelphia radio station WIBG's Future Forty chart for November 2, 1959, but did not chart elsewhere. The four tracks were purchased by King Records in 1961 and were re-released as two 45s by Federal Records in April and June 1961. Hardesty recorded four more songs in October 1961, which were released in 1962 by Federal; two are not instrumentals and had vocals by the New Orleans guitarist Walter "Papoose" Nelson. Hardesty co-wrote the title track of Fats Domino's 1964 album, Fats on Fire.
Links: a. Single (music) b. The Diamonds c. The Diamonds d. The Diamonds
Example Output: b

Example Input: Question: Who was older the year Culberson signed with the Dodgers, Dave Roberts or Boone Logan? Passage:Culberson was signed by the Dodgers in November 2015 and invited to spring training, where he impressed new Dodgers manager Dave Roberts. After an injury to Howie Kendrick opened a spot for him, Culberson made the Dodgers 2016 Opening Day roster. He was designated for assignment in July and optioned to the Oklahoma City Dodgers, then recalled a month later. Culberson ended the big club's final home game of the season with a walk-off home run against former Rockies teammate Boone Logan, clinching the Dodgers' fourth consecutive National League West division title. He played in 34 games for Los Angeles, hitting .284 and in 70 games for Oklahoma City, hitting .260. He had no hits in seven at-bats with two strikeouts in the 2016 National League Division Series. He was outrighted to the minors and removed from the 40-man roster on December 9, 2016. He was assigned to Oklahoma City to begin the season. He remained in the minors for the conclusion of the AAA season, hitting .250 in 108 games and returned to the majors with the Dodgers on September 4. In 15 games for the Dodgers, he hit .154 with two hits in 13 at-bats. When starting shortstop Corey Seager was left off of the 2017 NLCS roster because of a back injury, Culberson was added to the post-season roster. He appeared in all five games of the series, with five hits in 11 at-bats for a .455 average. In the 2017 World Series, Culberson had three hits in five at-bats, including his first career post-season home run, which he hit off Chris Devenski of the Houston Astros in the 11th inning of Game Two.
Links: a. Dave Roberts (outfielder) b. Houston Astros c. Houston Astros d. Boone Logan
Example Output:
d