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 aircraft had a longer operational lifespan in the Royal Canadian Air Force between the McDonnell CF-101 Voodoo and the Avro CF-100 Canuck? Passage:The McDonnell CF-101 Voodoo was an all-weather interceptor aircraft operated by the Royal Canadian Air Force and the Canadian Forces between 1961 and 1984. They were manufactured by the McDonnell Aircraft Corporation of St. Louis, Missouri for the United States Air Force (as F-101s), and later sold to Canada. CF-101s replaced the obsolete Avro CF-100 Canuck in the RCAF's all-weather fighter squadrons. The Voodoo's primary armament was nuclear AIR-2A Genie unguided air-to-air rockets, and there was significant political controversy in Canada about their adoption. Although they never fired a weapon in wartime, the CF-101 served as Canada's primary means of air defence from Quick Reaction Alert facilities at Canadian airbases. The CF-101s were retired in the 1980s and replaced with McDonnell Douglas CF-18 Hornet fighters. Many examples are preserved in museums and parks in Canada and the United States.
 Links: a. Avro Canada CF-100 Canuck b. Interceptor aircraft c. Interceptor aircraft d. Royal Canadian Air Force

Ex Output:
a


Ex Input:
Question: Which of the two Chicago Bulls player who were teammates on Detroit Pistons and won back-to-back titles had a longer tenure with the Pistons? Passage:The 1995–96 NBA season was the Bulls' 30th season in the National Basketball Association. During the offseason, the Bulls acquired rebound-specialist Dennis Rodman from the San Antonio Spurs, and signed free agent Randy Brown. Midway through the season, the team signed John Salley, who was released by the expansion Toronto Raptors. Salley won championships with the Detroit Pistons along with Rodman in 1989 and 1990. The 1996 Bulls is regarded to be the greatest Jordan team of the 90s and undoubtably of all time. This saw the Bulls set the record for most wins in an NBA regular season in which they won the championship, finishing with 72 wins and 10 losses. The regular season record was broken by the 2015–16 Golden State Warriors, who finished 73–9. The Warriors(2015-2016) have a connection to the (1995-1996) Bulls team, as Steve Kerr, the current Golden State coach, was a reserve point guard with the Bulls. 
 Links: a. 1995–96 Toronto Raptors season b. Detroit Pistons c. Dennis Rodman d. Dennis Rodman

Ex Output:
c


Ex Input:
Question: Which of the 2005 awards that Watts received was established first? Passage:Watts played Ann Darrow in Peter Jackson's monster film remake King Kong (2005), for which she won the Saturn Award for Best Actress. In the same year she voiced Darrow in her only video game role to date, the video game adaptation to King Kong. For the role, she was nominated for Best Performance by a Female at the 2005 Spike Video Game Awards. Five years later she portrayed CIA officer Valerie Plame in biographical drama Fair Game (2010) with Sean Penn. In 2011, Watts played FBI director J. Edgar Hoover's secretary Helen Gandy in the biographical drama J. Edgar with Leonardo DiCaprio. The following year, she starred as a doctor who is caught up by the aftermath of the 2004 Indian Ocean tsunami with her family in The Impossible (2012). For her performance, Watts received nominations for Best Actress at the Oscars and Golden Globe Awards.
 Links: a. 2004 Indian Ocean earthquake and tsunami b. Saturn Award for Best Actress c. Saturn Award for Best Actress d. Valerie Plame

Ex Output:

b