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 the leader of Solidarity in 1991? Passage:The 1991 Polish parliamentary election was held on 27 October 1991 to elect deputies to both houses of the National Assembly. The 1991 election was notable on several counts. It was the first parliamentary election to be held since the formation of the Third Republic, the first entirely free and competitive legislative election since the fall of communism, the first completely free legislative election of any sort since 1928, and only the fifth completely free election in all of Polish history. Due to the collapse of the Solidarity movement's political wing, the 1991 election saw deep political fragmentation, with a multitude of new parties and alliances emerging in its wake. Low voting thresholds within individual constituencies, along with a five percent national threshold allocated to a small portion of the Sejm, additionally contributed to party fragmentation. As a result, 29 political parties gained entry into the Sejm and 22 in the Senate, with no party holding a decisive majority. Two months of intense coalition negotiations followed, with Jan Olszewski of the Centre Agreement forming a minority government along with the Christian National Union, remnants of the broader Center Civic Alliance, and the Peasants' Agreement, with conditional support from Polish People's Party, Solidarity and other minor parties.
 Links: a. Solidarity (Polish trade union) b. Solidarity (Polish trade union) c. Jan Olszewski d. Centre Agreement
Example Output: a

Example Input: Question: Where does the route begin that 104 intersects with in Stamford? Passage:Route 104 begins at an intersection with Route 137 in the Bulls Head section of Stamford and heads north, passing by GE Capital, then crossing the Rippowam River, up through North Stamford and onto New York state line. About north of the river, Route 104 crosses under the Merritt Parkway (Route 15) at Exit 34 into the North Stamford section of the city. After another , Route 104 crosses over the Mianus River, through the Long Ridge section of the city, as it heads towards the New York state line. The road ends in the town of Pound Ridge, New York and continues as Westchester County Road 3. Route 104 is known as Long Ridge Road throughout its length and is classified as a principal arterial road, carrying traffic volumes of as much as 30,000 vehicles per day, particularly near the Merritt Parkway interchange. Route 104 is four lanes wide from Route 137 to Route 15, and two lanes wide north of Route 15.
 Links: a. North Stamford b. Connecticut Route 137 c. Merritt Parkway d. Mianus River
Example Output: b

Example Input: Question: Was the college where Revercomb got a law degree founded earlier than the one he graduated from in 1950? Passage:Born in Charleston, West Virginia, Revercomb received an Artium Baccalaureus degree from Princeton University in 1950. He was in the United States Air Force from 1951 to 1953, and received a Juris Doctor from the University of Virginia School of Law in 1955. Revercomb was a legal assistant for the Federal Communications Commission in Washington, D.C. from 1958 to 1959. He was in private practice in Norfolk, Virginia from 1961 to 1962. He was in private practice in Roanoke, Virginia from 1955 to 1956, then in Charleston, West Virginia from 1956 to 1961, and in Washington, D.C. from 1962 to 1969. Revercomb was an associate deputy United States Attorney General of the United States Department of Justice from 1969 to 1970. He was an Associate Judge of the Superior Court of the District of Columbia from 1970 to 1985. He received a Master of Laws from the University of Virginia School of Law in 1982, at age 53.
 Links: a. Juris Doctor b. West Virginia c. Virginia d. University of Virginia School of Law
Example Output:
d