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: Who was in charge at Princeton University the year Barschall graduated from that school? Passage:Barschall was born as Heinrich Hermann Barschall in Berlin, Germany; his father was a patent attorney who had received a Ph.D. in chemistry after studying with Nobel Laureates Emil Fischer and Fritz Haber. After beginning study in several universities in Germany, he emigrated to the United States in 1937 during the early Holocaust period; though raised as a Lutheran, he had some Jewish ancestry. He received his Ph.D. from Princeton University in 1940 under the direction of Rudolf Ladenburg; he also worked closely with John A. Wheeler. After a suggestion by Niels Bohr, he carried out in only a few days with fellow graduate student Morton H. Kanner the first demonstration of fission by fast neutrons and thorium and uranium. His thesis was on the interaction of fast neutrons with helium. In a paper with John A. Wheeler he reported the discovery of spin-orbit coupling in neutron scattering.
 Links: a. Emil Fischer b. Princeton University c. Jews d. John Archibald Wheeler
Example Output: b

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: Who appointed Plasterk in 2012? Passage:After the election of 2006 Plasterk was appointed as Minister of Education, Culture and Science in the Cabinet Balkenende IV, taking office on 22 February 2007. The Cabinet Balkenende IV fell on 20 February 2010 after tensions in the coalition over the extension of the Dutch involvement in the Task Force Urozgan of the International Security Assistance Force (ISAF) in Afghanistan and continued to serve in a demissionary capacity until the Labour Party cabinets members resigned on 23 February 2010. Plasterk was elected as a Member of the House of Representatives after the election of 2010, taking office on 17 June 2010 serving as a frontbencher and spokesperson for Finances. After the Leader of the Labour Party and Parliamentary leader of the Labour Party in the House of Representatives Job Cohen announced that he was stepping down as Leader and Parliamentary leader in the House of Representatives following increasing criticism on his leadership, Plasterk announced his candidacy to succeed him. Plasterk lost the leadership election to fellow frontbencher Diederik Samsom on 16 March 2012. After the election of 2012 Plasterk was appointed as Minister of the Interior and Kingdom Relations in the Cabinet Rutte II, taking office on 5 November 2012. Plasterk took a medical leave of absence from 29 June 2016 until 16 September 2016 during which Minister for Housing and the Central Government Sector Stef Blok served as acting Minister of the Interior and Kingdom Relations. On 10 September 2016 Plasterk announced announced his retirement from national politics and that he wouldn't stand for the election of 2017. The Cabinet Rutte II was replaced by the Cabinet Rutte III following the cabinet formation of 2017 on 26 October 2017.
 Links: a. Dutch cabinet formation b. List of Ministers of Education of the Netherlands c. Spokesperson d. List of Ministers of the Interior of the Netherlands
Example Output:
d