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: Which Nobel Laureate had published more papers by the year Barschall emigrated to the US, Fritz Haber or Emil Fischer? 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. Fritz Haber b. Jews c. Nuclear fission d. Emil Fischer

Ex Output:
d


Ex Input:
Question: Which league were the second team Farrell played for in? Passage:John A. "Jack" Farrell (July 5, 1857 – February 9, 1914), also known as "Moose", was an American Major League Baseball player who played mainly second base in his 11 seasons. Born in Newark, New Jersey, Farrell made his major league debut for the Syracuse Stars of the National League, where he played the majority of that season, until moving onto the Providence Grays, where he played the next six seasons. His career numbers include 877 hits in 884 games played, 23 home runs, and a .243 batting average. In , he began the season as the player-manager for the Grays, compiling a 24 win, 27 loss record. On August 3, Farrell quit as "captain" of the team. He was succeeded by outfielder Tom York, and the team finished the season with 23 wins against 10 losses, good for second place.
 Links: a. Games played b. Tom York (baseball) c. Providence Grays d. Major League Baseball

Ex Output:
c


Ex Input:
Question: How many volunteers did the regiment Pierson helped organize have? Passage:In 1857, he enlisted as a private in Company K of the 7th Regiment of the New York National Guard, and was attached to the staff of Brig. Gen. William Hall. At the start of the American Civil War, Pierson helped organize the 1st New York Volunteer Infantry Regiment, and was appointed captain in May 1861. He was promoted several times and assumed command of the regiment on October 9, 1862, with the rank of colonel. Attached to the 3rd Corps, Army of the Potomac, he led the 1st New York in actions at the Seven Days Battles, Second Manassas and the Battle of Fredericksburg. After the Battle of Chancellorsville in May 1863, Colonel Pierson was honorably discharged and mustered out on May 25, 1863. For distinguished service, he was brevetted brigadier general of the United States Volunteers for "gallant and meritorious services."
 Links: a. Battle of Fredericksburg b. American Civil War c. 1st New York Volunteer Infantry Regiment d. New York Army National Guard

Ex Output:

c