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 old was Warren Harding the year Coolidge was born? Passage:Calvin Coolidge (born John Calvin Coolidge Jr.; ; July 4, 1872 – January 5, 1933) was an American politician and lawyer who served as the 30th president of the United States from 1923 to 1929. A Republican lawyer from New England, born in Vermont, Coolidge worked his way up the ladder of Massachusetts state politics, eventually becoming governor of Massachusetts. His response to the Boston Police Strike of 1919 thrust him into the national spotlight and gave him a reputation as a man of decisive action. The next year, he was elected vice president of the United States, and he succeeded to the presidency upon the sudden death of Warren G. Harding in 1923. Elected in his own right in 1924, he gained a reputation as a small government conservative and also as a man who said very little and had a rather dry sense of humor.
 Links: a. Vice President of the United States b. Politics c. Boston Police Strike d. Warren G. Harding

Ex Output:
d


Ex Input:
Question: How long did the Siege of Boston last? Passage:The Battle of Lexington and Concord was the first conflict in the American Revolutionary War. On April 19, 1775, a force of British Army regulars marched from Boston to Concord to capture a cache of arms that was reportedly stored in the town. Forewarned by Samuel Prescott (who had received the news from Paul Revere), the colonists mustered in opposition. Following an early-morning skirmish at Lexington, where the first shots of the battle were fired, the British expedition under the command of Lt. Col. Francis Smith advanced to Concord. There, colonists from Concord and surrounding towns (notably a highly drilled company from Acton led by Isaac Davis) repulsed a British detachment at the Old North Bridge and forced the British troops to retreat. Subsequently, militia arriving from across the region harried the British troops on their return to Boston, culminating in the Siege of Boston and the outbreak of the war.
 Links: a. Old North Bridge b. Paul Revere c. Siege of Boston d. Isaac Davis (soldier)

Ex Output:
c


Ex Input:
Question: How much was Alford purchased for? Passage:Timothy Woodbridge (February 27, 1709 – May 10, 1774) was an American missionary, deacon and schoolteacher, later a judge, representative, and Superintendent of Indian Affairs, from Springfield, Massachusetts, who spent most of his adult life in Stockbridge, Massachusetts, teaching the Mahicans and other Native Americans to read and write, English customs and the Christian religion. About him, Jonathan Edwards said, "By his long-proved justice and integrity, he has gained a vast esteem with the Indians". Reverend John Sergeant described his efforts in this way: "Mr. Woodbridge ... has a very numerous school and a tedious task of it; lives a very lonesome life; is indeed indefatigable in his business; and no body deserves more of the publick than he." Gideon Hawley called him "a man of abilities... always poor, and had a powerful party against him; but he rose to be the first man in the county." Timothy worked very closely with all three men. He was instrumental in the purchase of large tracts of land in western New England from the Native Americans, such as modern-day Lenox and Alford, Massachusetts, by parlaying this reputation and experience.
 Links: a. Alford, Massachusetts b. Indigenous peoples of the Americas c. Lenox, Massachusetts d. Indigenous peoples of the Americas

Ex Output:

a