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 year saw the publication of the eleventh edition of the zoological book published by a Swedish naturalist who included the hook-billed vanga in the twelfth edition of the book? Passage:In 1760 the French zoologist Mathurin Jacques Brisson included a description of the hook-billed vanga in his Ornithologie based on a specimen collected on the island of Madagascar. He used the French name L'écorcheur de Madagascar and the Latin Collurio Madagascariensis. Although Brisson coined Latin names, these do not conform to the binomial system and are not recognised by the International Commission on Zoological Nomenclature. When in 1766 the Swedish naturalist Carl Linnaeus updated his Systema Naturae for the twelfth edition, he added 240 species that had been previously described by Brisson. One of these was the hook-billed vanga. Linnaeus included a brief description, coined the binomial name Lanius curvirostris and cited Brisson's work. It is now the only species placed in the genus Vanga that was introduced by the French ornithologist Louis Jean Pierre Vieillot in 1816. The specific name curvirostris is from Latin curvus "curved" and -rostrum "billed". The word "vanga" is the Malagasy name for the species. Two subspecies are recognised.
 Links: a. International Commission on Zoological Nomenclature b. Mathurin Jacques Brisson c. Systema Naturae d. Systema Naturae
Example Output: c

Example Input: Question: Who was the number one pick of the 1991 NHL Draft? Passage:Holzinger was drafted in the sixth round, 124th overall, by the Buffalo Sabres in the 1991 NHL Entry Draft. He played High School Hockey at Padua Franciscan High School in Parma, Ohio and four years of college hockey at Bowling Green State University, and was the recipient of the Hobey Baker Award for top men's collegiate hockey player during his senior season. He made his National Hockey League debut with the Sabres during the 1994–95 season, appearing in four regular season games and four playoff games (scoring two goals during the Sabres' playoff series against the Philadelphia Flyers). After four and a half seasons with the Sabres, he was traded at the trade deadline of the 1999–2000 season (along with Cory Sarich and Wayne Primeau) to the Tampa Bay Lightning in exchange for Chris Gratton and a second-round draft pick.
 Links: a. Chris Gratton b. Buffalo Sabres c. 1991 NHL Entry Draft d. 1991 NHL Entry Draft
Example Output: c

Example Input: Question: What year did the reform movement begin? Passage:CNN claims that Shubert was one of the first CNN correspondents to report on the 2004 Indian Ocean earthquake and resulting tsunami, reporting from Aceh, Indonesia, where she was vacationing at the time. Also in Indonesia, Shubert covered a number of major new events that included the 2002 Bali bombings, the fall of Indonesian President Abdurrahman Wahid and the inauguration of President Megawati Sukarnoputri, East Timor's transition to independence, the resurgence of the Free Aceh separatist movement, the religious conflict in Ambon City and the fall of former Indonesian President Suharto and resulting reform movement. Shubert also briefly covered the Schapelle Corby verdict in Bali; however, due to the time consuming and overall expensive nature of this landmark court case, CNN eventually opted to run stock footage obtained from its Australian network affiliates instead of direct reporting. Shubert has also contributed reports from the Philippines and Singapore.
 Links: a. Suharto b. East Timor c. Ambon, Maluku d. Ambon, Maluku
Example Output:
a