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.

Ex Input:
Question: How wide is the body of water that separates the Eurasian and North American continents? Passage:The Russian Empire began its interest of the Pacific Northwest in the 18th century, initially curious if there was a land connection between the Eurasian and North American Continents. Two expeditions were led by Vitus Bering, with the findings proving the separation of two continents through the Bering Sea. Being the first European nation to chart much of what comprises the modern American state of Alaska, many locations retain Russian place names. The discovery of sizable fur bearing populations by Bering drew the attention of promyshlenniki previously engaged in the Siberian fur trade. Based out of the Siberian ports of Okhotsk or Petropavlovsk, fur trappers sailed and reported the location of land formations like the Aleutian Islands, Kodiak Island and portions of the Alaskan mainland. Relations with Native Alaskans was often terse due to the uncontrolled actions of particular promyshlenniki who killed and raped Indigenous on islands they trapped furs.
 Links: a. Bering Sea b. Siberia c. Russian Empire d. Bering Sea

Ex Output:
a


Ex Input:
Question: When was the organization founded to which Cross received appointment as a chevalier? Passage:Colonel Marie Augstin Gaston Cros (known as Gaston Cros) (6 October 1861 – 10 May 1915) was a French army officer and archaeologist. He was born in Alsace and was displaced when that territory was incorporated into the German Empire. He joined the French Army as a lieutenant and saw action in Tonkin before spending several years surveying in Tunisia, receiving the honours of membership of Vietnamese and Tunisian orders and appointment as a chevalier of the Legion of Honour. In 1901 Cros was appointed head of the French archaeological expedition to Girsu, Iraq to continue the work of Ernest de Sarzec. His work over the next five years included the tracing of the thick city wall and for his work there received a letter of commendation from Gaston Doumergue, the Minister of Fine Arts, and the award of the Golden Palms of the Ordre des Palmes Académiques. Promoted to lieutenant-colonel, Cros served in the French protectorate of Morocco from 1913, seeing action in the Zaian War.
 Links: a. Tonkin b. Zaian War c. Ernest de Sarzec d. Legion of Honour

Ex Output:
d


Ex Input:
Question: What was the name of the jockey that rode the favored horse that Fenomeno was considered less fancied against? Passage:On his three-year-old debut, Fenomeno won a minor race over 200 metres at Tokyo on 29 January, beating the subsequent Tenno Sho (autumn) winner Spielberg into second place. He then stepped up in class for the Yayoi Sho (a trial for the Satsuki Sho) at Nakayama and finished sixth of the fifteen runners behind Cosmo Ozora. On 28 April the colt was moved up in distance for the Grade 2 Aoba Sho over 2400 metres at Tokyo and started the 1.1/1 favourite against sixteen opponents. Ridden by Masayoshi Ebina, who became his regular jockey, he recorded his first important success as he came home two and a half lengths clear of Etendard. The colt was then moved into the highest class to contest the Tokyo Yushun on 27 May in which he started at odds of 13.6/1. He was less fancied than Sunday Racing's other two runners World Ace (the favourite) and Deep Brillante with the best of the other runners appearing to be Gold Ship and Grandezza (Spring Stakes). Coming from well off the pace, Fenomeno produced a strong, sustained run on the outside, but just failed to overhaul Deep Brillante and was beaten a nose in a photo finish.
 Links: a. Spring Stakes (Japan) b. Deep Brillante c. Graded stakes race d. Aoba Sho

Ex Output:

b