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: How long did the war that Potter fought in as an officer in the Royal Field Artillery last? Passage:Potter was born in Bedford to Reverend Brignal Peel, a Wesleyan minister, and Elizabeth Stimson. He was educated at Bedford Modern School and for a time at Worcester College, Oxford. He first performed in E. M. Royle's The White Man at the Lyric Theatre in London before touring. In 1915 he was George Robey's understudy at the Alhambra. During the Great War Potter served as a 2nd lieutenant in the Royal Field Artillery in France. He served in the 6th Division 2nd Brigade 21st Battery, from 8 February 1917 before returning to music hall once the war was over. Potter cultivated an individual style and persona, wearing a straw boater, wide grey flannel trousers (he said he invented the Oxford bags style at the Coliseum in 1920), an 'Old Borstolian' blazer and carrying a notebook with a rolled umbrella. James Agate described him as "that sham Harrovian who bears upon his blazer the broad arrows of a blameful life".
 Links: a. Harrow School b. World War I c. Lyric Theatre, London d. World War I
Example Output: b

Example Input: Question: Which of Hyam's male co-stars in Alias Jimmy Valentine was the oldest? Passage:She made her first film in 1924, and with her blonde hair, green eyes, delicate features, and good-natured demeanor, was cast in a string of supporting roles, where she was required to do very little but smile and look pretty. She proved herself capable of handling the small roles she was assigned, and over a period of time, she came to be taken seriously as an actress. By 1928, she was playing starring roles, achieving success in MGM's first talkie release, Alias Jimmy Valentine (1928) opposite William Haines, Lionel Barrymore, and Karl Dane. The following year, she appeared in the popular murder mystery The Thirteenth Chair, a role that offered her the chance to display her dramatic abilities as a murder suspect. At Fox that same year, she appeared in director Allan Dwan's now lost romantic adventure The Far Call opposite Charles Morton. The quality of her parts continued to improve as the decade turned, including a role as Robert Montgomery's sister in the prison drama The Big House (1930) with Chester Morris and Wallace Beery, for which Hyams once again received positive reviews. She then appeared in Surrender (1931) in which Warner Baxter and Ralph Bellamy desperately competed for her attention.
 Links: a. Lionel Barrymore b. Lionel Barrymore c. The Big House (1930 film) d. Alias Jimmy Valentine (1928 film)
Example Output: d

Example Input: Question: Did the actor who played Sherpa guide Kusang have a wife? Passage:Dr. John Rollason (Peter Cushing), his wife, Helen (Maureen Connell), and assistant, Peter Fox (Richard Wattis), are guests of the Lama (Arnold Marlé) of the monastery of Rong-buk while on a botanical expedition to the Himalayas. A second expedition, led by Dr. Tom Friend (Forrest Tucker) accompanied by trapper Ed Shelley (Robert Brown), photographer Andrew McNee (Michael Brill) and Sherpa guide Kusang (Wolfe Morris), arrives at the monastery in search of the legendary Yeti or Abominable Snowman. Rollason, despite the objections of his wife and the Lama, decides to join Friend's expedition. Whereas Rollason is motivated by scientific curiosity to learn more about the creature, Friend seeks fame and fortune and wants to capture a live Yeti and present it to the world's press.
 Links: a. Wolfe Morris b. Himalayas c. Arnold Marlé d. Forrest Tucker
Example Output:
a