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 many copies did "My Generation" sell the year it was released? Passage:A deliberate use of acoustic feedback was pioneered by Blues and Rock'n'Roll guitarists such as Willie Johnson, Johnny Watson and Link Wray. According to AllMusic's Richie Unterberger, the very first use of feedback on a commercial rock record is the introduction of the song "I Feel Fine" by the Beatles, recorded in 1964. Jay Hodgson agrees that it was the first chart-topper to showcase feedback distortion, created by John Lennon leaning a semi-acoustic guitar against an amplifier. The Who's 1965 hits "Anyway, Anyhow, Anywhere" and "My Generation" featured feedback manipulation by Pete Townshend, with an extended solo in the former and the shaking of his guitar in front of the amplifier to create a throbbing noise in the latter. Canned Heat's "Fried Hockey Boogie" (off of their 1968 album Boogie with Canned Heat) also featured guitar feedback produced by Henry Vestine during his solo to create a highly amplified distorted boogie style of feedback. In 1963, the teenage Brian May and his father custom-built his signature guitar Red Special, which was purposely designed to feed back.
Links: a. Anyway, Anyhow, Anywhere b. My Generation c. Boogie with Canned Heat d. Johnny "Guitar" Watson

Ex Output:
b

Ex Input:
Question: Which of Messner's teachers at the University of Munich was older? Passage:After Meissner's abitur at the Humanistisches Gymnasium, in 1910, he began the study of physics and mathematics at University of Tubingen. After three terms, he went to the University of Munich as a student of the experimentalist Wilhelm Rontgen and the theoretician Arnold Sommerfeld. After one year at Munich, he returned to Tubingen to be able to study spectroscopy with Friedrich Paschen. While still a student in 1914, Meissner was able to prove the existence of oxygen lines in the solar spectrum. He was awarded his doctorate in 1915, on a thesis with the title Interferometrische Wellenlangenbestimmung im infraroten Spektralbereich. In 1916 he became an assistant to Edgar Meyer at the University of Zurich, under whom he completed his Habilitation, in 1918, with the Habilitationsschrift title Untersuchungen des Neonspektrums. The following year, he married the Polish physicist Doctor Janka Kohn.
Links: a. Habilitation b. Ludwig Maximilian University of Munich c. University of Tubingen d. Wilhelm Rontgen

Ex Output:
d

Ex Input:
Question: How many games did the Wolverhampton Wanderers win the year Nightingale joined the team? Passage:Nightingale was born in 1899 in Oldbury, which was then in Worcestershire. He played non-league football for Brandhall Rovers and Kidderminster Harriers before joining Wolverhampton Wanderers in late 1919. He played three Second Division matches, but was released at the end of the season and joined Shrewsbury Town of the Birmingham & District League. Brighton & Hove Albion of the Third Division South paid 100 for his services in 1921, and he went on to make nearly 200 first-team appearances over six years, and was a regular at outside right for the last four of the six. He then rejoined Shrewsbury Town in 1927. Nightingale lived in Brighton in his later years, and died in the town in 1967 at the age of 68.
Links: a. Non-League football b. Wolverhampton Wanderers F.C. c. Oldbury, West Midlands d. Football League Second Division

Ex Output:
b