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: What city was the game held where Beccacece's team beat O'Higgins 8-1? Passage:On 24 January, in his second league game since his debut for this competition at the bench (a 1–1 away draw with Deportes Antofagasta), Beccacece impressed following the team’s 8–1 home thrash over O'Higgins at the Estadio Nacional. After of that great victory nevertheless the team reaped three draws and one loss against Palestino (2–1). During February’s first days, the team was eliminated of the Copa Libertadores first stage by Uruguay’s River Plate F.C., which was his first failure and it meant being the target of criticism from the press and the team’s supporters. On 28 February, the 4–1 away victory over Cobresal would be a balm of the team’s moment. Following a 0–0 draw with Unión Española and two losses (3–1 with Universidad de Concepción as local and 5–4 against Santiago Wanderers as visitors), he back to draw, now in the Chilean football derby with Colo-Colo, which was again a goalless where both teams were criticized for its game level. Finally, Beccacece would end in the tenth place with three wins, seven draws and five losses and his continuity was heavily questioned during the Copa América Centenario break.
 Links: a. Estadio Nacional Julio Martínez Prádanos b. 2016 Copa Libertadores first stage c. C.D. Antofagasta d. 2016 Torneo Clausura (Chile)
Example Output: a

Example Input: Question: How old was the commander in chief when he coordinated a massive anti-guerrilla operation? Passage:In 1970, 22-year-old Crespo had dropped out of IST and was eventually drafted into military service in the Portuguese Colonial War. He transferred to Mozambique where his military occupation was to check the cement cargoes from Beira to the Cahora Bassa Dam construction site, near Tete. Some time later, due to his good fluency in English, he was placed in the press office of Kaúlza de Arriaga, the commander in chief of the Portuguese Armed Forces in Mozambique, who had coordinated a massive anti-guerrilla operation against FRELIMO separatists in 1970 - the Gordian Knot Operation. While serving in the army, Crespo also entered the newly created School of Medicine of the University of Lourenço Marques where he would complete a number of academic disciplines but did not graduate. He also married Helen de Souza from Johannesburg, a South African woman with Portuguese ancestry who worked in genetics. After the Carnation Revolution left-leaning military coup at Lisbon in April 1974, fresh out of the troop, Crespo fled Mozambique for South Africa.
 Links: a. Portuguese Colonial War b. Tete, Mozambique c. Kaúlza de Arriaga d. Kaúlza de Arriaga
Example Output: c

Example Input: Question: How many years of wrestling experience does the man who declared himself the number-one contender have? Passage:The main feud heading into Judgment Day 2006 involved Rey Mysterio and John "Bradshaw" Layfield (JBL) with the two battling over the World Heavyweight Championship. On the May 5 episode of SmackDown!, after Rey Mysterio expressed his feelings about being World Heavyweight Champion, John "Bradshaw" Layfield came out and declared himself the number-one contender. JBL immediately began degrading Mysterio because of his Mexican heritage, saying he was an illegal immigrant and that Mysterio doesn’t deserve to be champion. Mysterio reacted by saying that he'd fight anyone at any time. In turn, JBL announced that Mysterio would face off against Mark Henry later that night. During the match, Mysterio tried to use his quickness to avoid Henry, but was easily countered by Henry's power. Mysterio was able to hit a 619 and a Seated senton, but was defeated when Henry hit the World's Strongest Slam for the pin. The next week on SmackDown!, JBL announced that Mysterio would take on The Great Khali later that night. During the match, Mysterio attempted a springboard dropkick, but it had no effect. Khali then picked up Mysterio and hit a Two-handed chokeslam for the win. On the May 19 episode of SmackDown!, JBL said that Mysterio didn't look so well due to the beatings he endured in past weeks and that he probably didn't even know what day it was. Mysterio answered and told him the day, May 19. Kane, who in recent weeks attacked anyone who said May 19, came out and faced off against Mysterio. Kane dominated most of the match, hitting a variety of power moves. Kane then began to hear voices in his head saying May 19, which caused him to go into a psychotic trance. JBL told him to finish the job, but mistakenly said May 19, causing Kane to attack him. As a result, the match ended in a no-contest.
 Links: a. Professional wrestling aerial techniques b. Feud (professional wrestling) c. John Layfield d. WWE Judgment Day
Example Output:
c