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: Who was the head coach for Ajax Youth Academy when Jozefzoon joined? Passage:A Winger and attacking midfielder, Jozefzoon began his career with spells at CTO '70 and AFC. He joined the Ajax Youth Academy in 2006 and signed a three-year professional contract in June 2008. Jozefzoon won his maiden call into the first team squad for the opening match of the 2010–11 Eredivisie season versus FC Groningen and remained an unused substitute during the 2–2 draw. He made his senior debut six days later, replacing Urby Emanuelson at half time during a 4–2 win over SBV Vitesse. He scored his only goal for the club in a 5–0 KNVB Becker third round win over MVV Maastricht on 22 September 2010. After five appearances during the 2010–11 season, Jozefzoon signed a one-year contract extension in June 2011, but spent the 2011–12 season away on loan and was released at the end of the season.
 Links: a. SBV Vitesse b. SBV Vitesse c. Ajax Youth Academy d. Ajax Youth Academy
Example Output: c

Example Input: Question: How old was Snow Chief in the 1986 Kentucky Derby race? Passage:Solis' first rode in the Kentucky Derby in 1983 on a longshot named Current Hope, and did not place in the money. He rode the Derby again in 1986 on Snow Chief, who had won the Santa Anita Derby and was the morning line favorite, but again finished well back. The horse and rider went on to with the Preakness Stakes that year, marking Solis' only win to date in an American Triple Crown race. He was third in the 1991 Derby on Mane Minister, and also third in the Belmont Stakes on the same horse. Solis finished second in the Kentucky Derby and third in the Preakness with Captain Bodgit in 1997, second in the Derby with Victory Gallop in 1998 and second in both the Derby and the Belmont with Aptitude in 2000. His first Breeders' Cup win was the 2000 Breeders' Cup Sprint on Kona Gold. He won two Breeders' Cup races in 2003 with Johar (who finished in a dead heat) in the Breeders' Cup Turf, and the Breeders' Cup Classic on Pleasantly Perfect, both trained by Richard Mandella. He ended 2003 ranked fourth nationally in purse earnings with a career-best $16,304,252.
 Links: a. Breeders' Cup Turf b. Santa Anita Derby c. Snow Chief d. Richard E. Mandella
Example Output: c

Example Input: Question: Which top scorer for both teams on the first day of the match was the oldest? Passage:The Essex v Northamptonshire match was played at Valentines Park, Ilford 17 to 20 May. Northamptonshire won the toss and decided to bat, scoring 215 all out with a top score of 49 by Vince Broderick while Essex's Test leg break and googly bowler Peter Smith took four for 65. By close of play on Saturday, Essex had replied to 170 for 4 with opener Chick Cray on 90 not out. He completed his century, exactly 100, on Monday morning and Essex went on to total 267 all out. Northamptonshire were 219 for 5 at the close on Monday evening with their veteran batsman John Timms on 90 not out. Timms was out for 112 on Tuesday morning and Peter Smith completed ten in the match by taking six for 84 in the Northamptonshire total of 291. Essex therefore needed 240 to win with ample time left on the final day. They had a good stand of 103 for the fourth wicket between Frank Vigar (60) and Len Clark (64) but spinners Broderick and Bertie Clarke kept picking up the wickets and Essex were still ten behind when the ninth went down. The last pair were captain Tom Pearce and wicketkeeper Tom Wade who managed to level the scores before Wade was bowled by Clarke to tie the match.
 Links: a. Ilford b. Frank Vigar c. Chick Cray d. Vince Broderick
Example Output:
d