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 was the combined age of Teatro dell'Opera di Roma and Teatro di San Carlo when Simone Alaimo first performed there? Passage:A native of Villabate, Alaimo studied at the Palermo Conservatory and then the L'Accademia di La Scala in Milan before making his début in 1977 at the Teatro Fraschini in Pavia as the title hero in Gaetano Donizetti's Don Pasquale. Shortly thereafter he joined the roster of singers at the Teatro Massimo in his home city. In 1980 he made his first appearance at the Piccola Scala in a production of Carlo Evasio Soliva's La testa di bronzo and performed for the first time at the Maggio Musicale Fiorentino as Radamanto in Giulio Caccini's Euridice. That year also marked his debut at the Festival de Ópera de Las Palmas and the Teatro Carlo Felice, two places he has sung with some frequency. In 1982 he performed for the first time at the Teatro di San Carlo, the Teatro dell'Opera di Roma, the Liceu, and the Rossini Opera Festival. He sang the role of Mustafà in Gioachino Rossini's L'italiana in Algeri for his United States debut at the Lyric Opera of Chicago in 1987. He reprised the role the following year for his first performance in the United Kingdom at the Royal Opera, London.
 Links: a. Liceu b. Rossini Opera Festival c. Teatro di San Carlo d. Maggio Musicale Fiorentino
Example Output: c

Example Input: Question: Of the two players who each scored first for Brazil and Chile, whose birthday falls earlier in the year? Passage:Brazil faced Chile in the round of 16, taking an 18th-minute lead through David Luiz's first goal for the Seleção. With no further scoring after Alexis Sánchez's equaliser, the match went to a penalty shootout. Brazil prevailed 3–2, with Neymar, David Luiz and Marcelo converting their kicks, and goalkeeper Júlio César saving from Chileans Sánchez and Mauricio Pinilla. The team again faced South American opposition in the quarter-final, defeating Colombia 2–1 with goals from central defenders David Luiz and team captain Thiago Silva. Late in the match, Neymar was substituted on a stretcher after Camilo Zúñiga's knee had made contact with the forward's back. Neymar was taken to hospital and later diagnosed with a fractured vertebra, which ruled him out for the remainder of the tournament. Prior to this, Neymar had scored four goals, provided one assist and been named man of the match twice. Brazil faced further problems ahead of their semi-final against Germany, as Thiago Silva was to serve a one-match suspension for receiving his second yellow card of the tournament in the quarter-final. The Seleção went on to lose 1–7 to the Germans, their biggest ever defeat at the World Cup and first home loss in a competitive match since 1975. Towards the end of the match, the home crowd began to "olé" each pass from the German team, and booed their own players off the pitch after the final whistle. The match has been nicknamed the Mineirazo, making reference to the nation's previous World Cup defeat on home soil, the Maracanazo against Uruguay in 1950, and the Estádio do Mineirão in Belo Horizonte where the match took place.
 Links: a. Brazil v Germany (2014 FIFA World Cup) b. 2014 FIFA World Cup knockout stage c. 2014 FIFA World Cup knockout stage d. David Luiz
Example Output: d

Example Input: Question: Was the failed penalty against Valencia a miss or a save? Passage:Arsenal had a better European record, compared to Galatasaray going into the match; they defeated Anderlecht with a 4–3 aggregate winning result, in the final of the 1969–70 Inter-Cities Fairs Cup. The London–based club reached the Cup Winners' Cup finales three times, in 1980, where they suffered a 4–5 defeat in a penalty shoot-out to Valencia, following a 0–0 stalemate; Arsenal also reached the 1994 final, winning 1–0 over Parma, and the following edition, losing 1–2 at the hands of Real Zaragoza. Their 1994 success led to them qualifying for that year's European Super Cup, where they were beaten 2–0 by Milan on aggregate in two games. This was Arsenal's first UEFA Cup (sixth in total) European final. The club were considered favorites to win the match.
 Links: a. 1979–80 European Cup Winners' Cup b. 1969–70 Inter-Cities Fairs Cup c. 1993–94 European Cup Winners' Cup d. 1969–70 Inter-Cities Fairs Cup
Example Output:
a