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: How many races had Sellers run the year he replaced Josh Reaume? Passage:Obaika Racing entered competition in 2015. The team signed driver Josh Reaume, who met team owner Victor Obaika while on humanitarian missions in Africa as a child. The 97 team debuted at the Daytona International Speedway in the Xfinity Series season-opening Alert Today Florida 300, with Reaume finishing 23rd. After three races, with one DNQ, Peyton Sellers replaced Reaume. In April 2015, the team secured their first sponsor vacation provider VroomBrands, which is owned by Obaika. VroomBrands wrapped the No. 97 in designs such as a Zebra representing their African safari package (debuted at Richmond International Raceway) and the Cheetah print representing their tours in Asia (debuted at Talladega Superspeedway). At the Winn-Dixie 300 at Talladega, Sellers scored the team's first top-20 finish, finishing 18th despite being involved in a ten-car wreck that sent cars spinning down pit road. Johanna Long replaced Sellers for the U.S. Cellular 250 at Iowa Speedway. After one more start for Sellers at Watkins Glen, the team introduced various drivers for the rest of the season. Dylan Kwasniewski debuted with the team in the Nationwide Children's Hospital at Mid-Ohio Sports Car Course, finishing 34th due to mechanical problems after running in the top 10. Kwasniewski would run the next two races for the team. Parker Kligerman drove the car in the VFW Sport Clips Help a Hero 200 at Darlington Raceway, Mason Mingus in the Furious 7 300 at Chicagoland Speedway, and Ryan Ellis in the Hisense 200 at the Dover International Speedway.
 Links: a. Sport Clips Haircuts VFW 200 b. Dylan Kwasniewski c. Peyton Sellers d. Peyton Sellers
Example Output: c

Example Input: Question: Has the the team against which Duda hit three home runs on July 29 ever played in a World Series? Passage:On July 29, during a 7–3 loss to the San Diego Padres, Duda became the eleventh Mets player to hit three home runs in a single game, and only the second Met to do so at home after Kirk Nieuwenhuis had accomplished the feat less than a month before. Duda set a Mets franchise record on August 1 when eight of his consecutive hits came in the form of home runs; he and teammate Noah Syndergaard were named National League Co-Players of the Week for the week ending on August 2. On September 26, Duda hit his first career grand slam in the Mets' 10–2 victory over the Cincinnati Reds. That victory clinched the NL East division title for the New York Mets. On the final day of the season, Duda was hit by a pitch from the Washington Nationals' Tanner Roark, giving him 14 total HBP on the season and breaking the Mets single season record, previously shared by John Olerud and Ron Hunt. For the season, he had the highest fly ball percentage (50.6%), and the lowest ground ball percentage (27.4%), of all major league hitters.
 Links: a. San Diego Padres b. Major League Baseball Player of the Week Award c. San Diego Padres d. San Diego Padres
Example Output: a

Example Input: Question: How long had the Royal Canadian Air Force existed the year that the McDonnell CF-101 Voodoo began being operated by them? 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. AIR-2 Genie b. Royal Canadian Air Force c. McDonnell Douglas CF-18 Hornet d. Royal Canadian Air Force
Example Output:
b