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 is the current age of the U.S. Army soldier who were held captive by the Taliban for five years? Passage:Serial is an investigative journalism podcast hosted by Sarah Koenig, narrating a nonfiction story over multiple episodes. The series was co-created and is co-produced by Koenig and Julie Snyder and developed by This American Life. Season one investigated the 1999 murder of Hae Min Lee (Hangul: 이해민), an 18-year-old student at Woodlawn High School in Baltimore. Season two focused on Sergeant Bowe Bergdahl, an American Army soldier who was held for five years by the Taliban, and then charged with desertion. Season three, which debuted in September 2018, explores cases within the Justice Center Complex in the Cleveland area. Serial ranked number one on iTunes even before its debut and remained there for several weeks. Serial won a Peabody Award in April 2015 for its innovative telling of a long-form nonfiction story. As of September 2018, episodes of seasons one and two have been downloaded over 340 million times, establishing an ongoing podcast world record.
 Links: a. Cleveland b. Bowe Bergdahl c. Bowe Bergdahl d. Desertion

Output: b


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: When did the operation which  the 3251st participated in direct support of the 45th Infantry Division begin? Passage: After taking part in both the Louisiana and the Carolina Maneuvers, B Company deployed to Oran, Algeria in November 1942 in support of the Mediterranean Base Section. In June 1944, the 3251st deployed to Italy in support of the 5th Army's Rome/Arno campaign. The 3251st was transferred to the 7th Army and remained under its command for the rest of the war. The 3251st participated in Operation Dragoon in direct support of the 45th Infantry Division under the command of the 240th Quartermaster Battalion and then supported the divisions of the 7th Army as they fought their way across France into Germany. The 3251st returned to the United States through the Newport News Port of Embarcation aboard the AP-116 General Meigs on 13 October 1945.
 Links: a. Carolina Maneuvers b. Operation Dragoon order of battle c. Italy d. USS General M. C. Meigs


Output: b