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: How long had FIU Stadium been standing for the year Straker played in a game against Honduras there? Passage:In May 2011, he was called up for the Grenadian national team for the upcoming CONCACAF Gold Cup. Straker played in two pre-tournament friendlies, including his debut in a 2–2 home draw with Antigua and Barbuda on 27 May 2011. He made his competitive debut for Grenada in their first match in the Gold Cup, a 4–0 loss to Jamaica at the Home Depot Center on 6 June 2011. Straker played in their two remaining group stage fixtures, a 7–1 defeat to Honduras at the FIU Stadium on 10 June 2011 and a 4–0 defeat to Guatemala at the Red Bull Arena on 13 June. He played in Grenada's three 2012 Caribbean Cup qualification second round matches, although they missed out on qualifying for the tournament after finishing in third place in their group on goal difference. He scored his first international goal with a 33rd-minute penalty kick in Grenada's 3–1 home defeat to Haiti in a 2018 FIFA World Cup qualifier on 4 September 2015.
 Links: a. Honduras national football team b. Riccardo Silva Stadium c. Antigua and Barbuda national football team d. Dignity Health Sports Park
Example Output: b

Example Input: Question: How long is the river that's located in western Sweetwater County? Passage:It rises in western Wyoming, in northern Sublette County, on the western side of the Continental Divide in the Bridger–Teton National Forest in the Wind River Range. It flows south through Sublette County and western Wyoming in an area known as the Upper Green River Valley, then southwest and is joined by the Big Sandy River in western Sweetwater County. At the town of La Barge, it flows into Fontenelle Reservoir, formed by Fontenelle Dam. Below there, it flows through open sage covered rolling prairie where it is crossed by the Oregon, California and Mormon emigration trails and then further south until it flows past the town of Green River and into the Flaming Gorge Reservoir in Southwestern Wyoming, formed by the Flaming Gorge Dam in northeastern Utah. Prior to the creation of the reservoir, the Blacks Fork joined the Green River south of Green River, today the mouth of Blacks Fork is submerged by the reservoir.
 Links: a. Big Sandy River (Wyoming) b. Flaming Gorge Reservoir c. Sweetwater County, Wyoming d. Mormon Trail
Example Output: a

Example Input: Question: How many people attended the event that Raiford covered on a live radio broadcast and is considered his best known work? Passage:'Robert D. Raiford (December 27, 1927 – November 17, 2017) was an American radio broadcaster and actor, best known for his political/social commentaries delivered during The John Boy and Billy Big Show, a morning radio program heard on stations throughout the American South. He was from Concord, North Carolina and majored in communication at the University of South Carolina. Raiford got his start in broadcasting in 1944 by calling play by play at baseball games. His first real radio job was at WEGO (AM) in Concord, North Carolina. Raiford has appeared in 28 movies, often portraying judge characters. He frequently closed his commentaries with the line "Who says that? I say that!", which also served as the title of a book containing excerpts from these segments. Early in his career, Raiford worked for WTOP radio and WTOP-TV, both CBS News affiliates in Washington, D.C.. His best-known work was a live radio broadcast on WTOP, a CBS Radio affiliate, covering the state funeral of President John F. Kennedy. He also worked at Charlotte radio station WBT. Raiford also hosted a show on WIST, which aired Charlotte's first telephone talk radio format. He later taught Communications at the University of North Carolina at Charlotte. From 1978 to 1986, Raiford was a news anchor and talk show host for Charlotte's NBC television affiliate. It was known as WRET-TV and then WPCQ-TV during his tenure there; it is now WCNC-TV. On the June 9, 2016, episode of The John Boy and Billy Big Show, John Isley ("John Boy") announced that Raiford had retired from the show, due to suffering a stroke the previous August that greatly affected his speech and mobility. Raiford had not delivered any commentaries during the intervening months, choosing to focus on his recovery instead.
 Links: a. Stroke b. State funeral of John F. Kennedy c. WFED d. University of North Carolina at Charlotte
Example Output:
b