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: Which team was ranked the highest at the 2009 Pacific Nations Cup? Passage:The 2009 Pacific Nations Cup is a rugby union tournament held between five national sides on the Pacific Rim: Fiji, Japan, Samoa, Tonga and the Junior All Blacks. The New Zealand Māori team that won the tournament last year will no longer take part in this competition because of a decision taken by the New Zealand Rugby Union. Australia A has also decided to pull out due to a similar decision. The inaugural competition was held in 2006. This year the tournament will begin on June 12 and ends on July 3, 2009 and most of the matches will be hosted by Fiji. The awarding of the key international tournament to the Fiji Rugby Union represents a further boost to the continued development of rugby in the region. The two opening round matches will be played outside of Fiji with Samoa hosting the Junior All Blacks in Apia and Tonga entertaining the Fijians in Nukuʻalofa the following day before the tournament moves to Fiji for a 17-day festival of international rugby spread across three match venues: the ANZ National Stadium (Suva), Churchill Park (Lautoka) and Lawaqa Park (Sigatoka).
 Links: a. New Zealand Rugby b. Fiji national rugby union team c. Samoa national rugby union team d. New Zealand Rugby
Example Output: b

Example Input: Question: How old was Beloff's husband when he died? Passage:Anne Beloff was born in 1921 in Hampstead to Simon Beloff and Marie Katzin. Her parents were of Russian–Jewish background, and her siblings included the historian Max Beloff, Baron Beloff, the psychologist John Beloff, the journalist Nora Beloff, and the politician Renee Soskin. She earned a degree in chemistry from University College London in 1942 before completing a PhD in the biochemistry of skin burns with Rudolph Peters at the University of Oxford. She visited Harvard Medical School in 1946 to perform research and returned to the UK in 1948. In the same year she married Ernst Boris Chain, a biochemist who had won the Nobel Prize in Physiology or Medicine in 1945, and moved with him to Rome.
 Links: a. Harvard Medical School b. Ernst Chain c. University of Oxford d. Hampstead
Example Output: b

Example Input: Question: Was San Francisco the capital of California in 1888? Passage:Eli Lequime (1811–1898) was born in France and began traveling the world in 1825 at the age of fourteen. He arrived in San Francisco in 1852 for the gold rush but soon gave up. Eli returned to France and fought in the Crimean War. He returned to San Francisco by 1856 and with his new wife, Marie Louise (née Altabagoethe) he caught a boat to Victoria, British Columbia. From there, the family caught a boat to the mainland. he had two children, Bernard and Gaston. The family panned for gold at Rock Creek which is west of Osoyoos. During Eli's time at Rock Creek, his son Gaston fell into a miner's sluice box and drowned at two years of age. Eli, Marie Louise and Bernard headed for the Cariboo with the hopes of striking it rich. On their way, Marie Louise gave birth to another son, who they named Gaston. Father Pandosy met the family on the trail and convinced them to come to Okanagan Mission with him. In 1861, Eli registered a land claim northeast of the Mission. Eli built a log home and a trading post on his new property. His store soon became the social and business hub of the area. Eli and Marie Louise had two more children at the Mission, Aminade (1866) and Leon (1870). The Lequime family had over 1,300 heads of cattle and had more than two thousand acres of land. Eli lived in the Mission Valley for twenty-seven years. When he was seventy, Eli decided to move back to San Francisco. By 1888 Eli was in San Francisco with his daughter, Aminade and his niece, Dorothy. Marie Louise would join him a couple years later. In 1905, Eli Lequime's homestead was added to the K.L.O. company for $12,000.00.
 Links: a. San Francisco b. San Francisco c. British Columbia d. Crimean War
Example Output:
a