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: 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

Ex Output:
c

Ex Input:
Question: Who was older during their time at Sports Fan Radio Network, Pete Rose or Pat O'Brian? Passage:By 1994, SportsFan expanded to a 24/7 format, seven days a week. The signature show, SportsFan Tonight moved its broadcast location from the MGM Grand Las Vegas in 1994. Later it moved to the sportsbook at the Mandalay Bay. The daily line up included baseball's all-time hit leader Pete Rose, as well as a stable of young talent. Others hosting shows over the years included former NFL QB Sean Salisbury, former NFL All-Pro Tim Ryan, Fox and CBS host James Brown, longtime broadcaster Pat O'Brien, former NBA coach Matt Goukas, NHL great Phil Esposito, former NFL All-Pro Bob Golic and former NCAA basketball coaches Bill Frieder and Fran Fraschilla. Other hosts included Bruce Schein, Chris Russo (now Russell), J. T. the Brick, Steve Cofield, Rob Tepper, Chuck Powell, Ryan Williams,Marty Tirrell, Ken Miller, Soren Petro, Rob Fischer, Mike "The Sports Pig" Responts, John Phillips, John Rabe, Brandon Tierney, Jim Brinson, Chad Andrus. Scott Ferrall, Dave Cokin, Eric Pollero, Tim Neverett and others. By the late '90s, SportsFan partnered with CBS Sportsline to broadcast two shows daily. One program was hosted by Craig Carton, the other "The Drive" with Scott Kaplan and Sid Rosenberg. Later they landed a handful of other significant names, including Nanci Donellan (a.k.a. "The Fabulous Sports Babe") from ESPN Radio. Keith Olbermann also hosted a few shows.
Links: a. Phil Esposito b. Sean Salisbury c. Pete Rose d. Keith Olbermann

Ex Output:
c

Ex Input:
Question: How old was Haughton when the Irish War of Independence began? Passage:Benjamin Haughton (18551932) was an Irish businessman from Cork city, who was an independent member of Seanad Eireann from 1922 to 1928. He was from the Cork branch of a Quaker family whose Carlow branch included social reformer James Haughton and scientist Samuel Haughton. Benjamin was head of Haughton's timber and iron merchants in Cork and a supporter of the local YMCA. During the Irish War of Independence he was involved with the Irish White Cross and among a group of liberal Southern unionists who sought conciliation with Sinn Fein in Cork in the lead-up to the 1921 truce. Upon the coming into force of the Constitution of the Irish Free State in 1922, W. T. Cosgrave as the President of the Executive Council nominated 30 of the initial 60 senators, including Haughton. These were subsequently divided by lottery into two cohorts of 15, serving terms of six and twelve years respectively, with Haughton drawing a six-year term. He lost his seat at the 1928 Seanad election. He and his wife Margaret Elizabeth Goodbody had five children.
Links: a. President of the Executive Council of the Irish Free State b. Cork (city) c. Irish White Cross d. Irish War of Independence

Ex Output:
d