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.

Input: Consider Input: Question: What was Montana's population the year that Thom Ross completed his work "Custer's Last Stand"? Passage:Ross' first plywood installation was a 1976 cutout of Clint Eastwood, which he and a friend placed as a prank above a railroad trestle to recreate a scene from Dirty Harry in the location where the scene had been filmed five years earlier. In 1983 Ross created "154 Nevermore", an installation of 154 plywood ravens on a highway in Jackson, Wyoming (recreated in steel in 2000). In 1984, Ross created "the Catch", a diorama for the Baseball Hall of Fame illustrating a legendary catch with the same nickname, by Willie Mays in the 1954 World Series. He created a new version of the work in 2004, and displayed it in various locations in New York City. In 1998 Ross created "The Defining Moment" for SAFECO Field, a tableau of 11 steel cutouts of a Ken Griffey, Junior play in the 1995 baseball playoffs. Ross' 2005 work, "Custer's Last Stand", was a recreation of life-sized warriors riding life-sized horses the Battle of Little Bighorn at the original site at Medicine Tail Coulee in Montana. That exhibit toured Cody, Wyoming, Jackson, Wyoming, and Sun Valley, Idaho. In September, 2008 Ross recreated a 1902 photograph of Buffalo Bill Cody and his "Wild West Show", his traveling troupe of Native Americans, in front of the Cliff House at Ocean Beach.
 Links: a. National Baseball Hall of Fame and Museum b. Battle of the Little Bighorn c. Montana d. T-Mobile Park

Output: c


Input: Consider Input: Question: How old was Kennedy when he was assassinated? Passage:1964 is a documentary film produced by Insignia Films for the American Experience series about political, social and cultural events in the United States for the calendar year 1964. It is based partly on Jon Margolis book The Last Innocent Year: America in 1964. The documentary depicts the year 1964 as significant and epic in that following the assassination of President John F. Kennedy in late 1963, 1964, as a presidential election year, becomes a departure point for American history, with lasting effects today. It is also the year of the British Invasion led by the Beatles, when Cassius Clay fights Sonny Liston for the World Heavyweight Championship, the year after Betty Friedan's book, The Feminine Mystique, is published, and the year Republican activist, Phyllis Schlafly's book, A Choice, Not an Echo, is published. It is also the year of Freedom Summer, an initiative by the Student Nonviolent Coordinating Committee to register African-Americans in Mississippi, the subsequent murders of Chaney, Goodman, and Schwerner, three CORE activists, in Mississippi by white supremacists that created a national sensation, and the Harlem riot of 1964, culminating in the Berkeley Free Speech Movement at the University of California at Berkeley. A recurrent theme of the film is its departure as a presidential election year, with President Lyndon B. Johnson running as the expected Democratic Party nominee and the nomination of U.S. Senator Barry Goldwater selected through a grassroots campaign for the Republican nomination for President of the United States, that defines the future divisions of the US political party competition.
 Links: a. British Invasion b. Harlem riot of 1964 c. Assassination of John F. Kennedy d. Muhammad Ali

Output: c


Input: Consider Input: Question: In what city was the author of Alice's Adventures in Wonderland born? Passage:Filmed in technicolor format, the music video for "Nobody's Perfect" was shot at Nu Boyana Film studios in Sofia, Bulgaria, on 24 March 2011 and was directed by Emil Nava. The music video premiered on 14 April 2011 in the United Kingdom through Jessie's Vevo channel. The music video is inspired by Lewis Carroll classic tale Alice's Adventures in Wonderland, Jessie J sits in a banquet table similar to the Mad Hatters' tea party. Jessie J is shown in a hall of doors that gives a resemblance to the curious hall in the first chapter of Alice in Wonderland. Jessie J also rolls in tar and appears dressed as the Roman goddess Libertas, who is better known as the robed female figure of the Statue of Liberty, what could be interpreted as Black-and-white dualism. After completing the filming sessions, Jessie J described the video as her favorite done so far.
 Links: a. Sofia b. Lewis Carroll c. Alice's Adventures in Wonderland d. Libertas


Output: b