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: 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: What is Lorraine Copeland's field of study? Passage:It was first studied by Lorraine Copeland and Peter Wescombe in 1965–1966. A wide variety of materials were recovered from the site and its immediate area that are now held in the Saint Joseph University in Beirut. Stone tools from the surface included numerous short, wide, sickle blades with fine denticulation or nibbling along with tanged arrowheads, scrapers, chisels, axes, burins, obsidian and a small green stone axe. Pottery resembled middle periods at Byblos and coloured similar to at Ard Tlaili with red or black washes. Both fine and coarse shards were found of jars with a variety of collared and flared necks and flat bases along with bow rims such as those found at Jericho. Vessels were decorated with stabbed and incised designs, finger pressed around the rim and smoothed by hand or with straw. A painted lattice pattern was detected on at least one piece. Comparisons were made with middle and late Neolithic periods at Byblos showing inhabitation from several phases. The site was also used in Bronze Age and Classical times and material from these phases has been found over a wide area around the site.
 Links: a. Beirut b. Lorraine Copeland c. Axe d. Arrowhead
Example Output: b

Example Input: Question: Which of Zambia's two swimmers at the 2012 Summer Olympics placed higher? Passage:The seven athletes that were selected to compete in the London Games were Gerald Phiri in the men's 100 metres, Prince Mumba in the men's 800 metres and Chauzje Choosha in the women's 100 metres. Choosha qualified via a wildcard and replaced long-distance runner Tonny Wamulwa, who withdrew before the opening of the Games because of injuries sustained in a road traffic accident on 9 July. Swimmers Zane Jordan and Jade Ashleigh Howard qualified for the Games via a universality place awarded by FINA as their best times of 59.33 and one minute and 1.24 seconds were not within the standard entry time. Judo Boas Munyonga qualified for the men's 81 kg event after being awarded an additional place in the additional places category for the African continent by the International Judo Federation. Boxer Gilbert Choombe qualified for the men's light welterweight following the conclusion of the AIBA African Olympic Qualifying Event.
 Links: a. Athletics at the 2012 Summer Olympics – Women's 100 metres b. FINA c. Zane Jordan d. International Judo Federation
Example Output:
c