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.

Question: How many people attended the conference held near Berlin in January 1942? Passage:Following the invasion of Poland in 1939 most of the 3.5 million Polish Jews were rounded up and put into newly established ghettos by Nazi Germany. The system was intended to isolate the Jews from the outside world in order to facilitate their exploitation and abuse. The supply of food was inadequate, living conditions were cramped and unsanitary, and the Jews had no way to earn money. Malnutrition and lack of medicine led to soaring mortality rates. In 1941, the initial victories of the Wehrmacht over the Soviet Union inspired plans for the German colonisation of occupied Poland, including all territory within the new district of General Government. At the Wannsee Conference held near Berlin on 20 January 1942, new plans were outlined for the genocide of the Jews, known as the "Final Solution" to the Jewish Question. The extermination programme was codenamed Aktion Reinhard in German, to differentiate it from the Einsatzgruppen mass killing operations in territories conquered by Nazi Germany, in which half a million Jews had already been annihilated.
 Links: a. Einsatzgruppen b. Wannsee Conference c. Operation Reinhard d. General Government
b

Question: How old was Snow Chief in the 1986 Kentucky Derby race? Passage:Solis' first rode in the Kentucky Derby in 1983 on a longshot named Current Hope, and did not place in the money. He rode the Derby again in 1986 on Snow Chief, who had won the Santa Anita Derby and was the morning line favorite, but again finished well back. The horse and rider went on to with the Preakness Stakes that year, marking Solis' only win to date in an American Triple Crown race. He was third in the 1991 Derby on Mane Minister, and also third in the Belmont Stakes on the same horse. Solis finished second in the Kentucky Derby and third in the Preakness with Captain Bodgit in 1997, second in the Derby with Victory Gallop in 1998 and second in both the Derby and the Belmont with Aptitude in 2000. His first Breeders' Cup win was the 2000 Breeders' Cup Sprint on Kona Gold. He won two Breeders' Cup races in 2003 with Johar (who finished in a dead heat) in the Breeders' Cup Turf, and the Breeders' Cup Classic on Pleasantly Perfect, both trained by Richard Mandella. He ended 2003 ranked fourth nationally in purse earnings with a career-best $16,304,252.
 Links: a. Breeders' Cup Turf b. Santa Anita Derby c. Snow Chief d. Richard E. Mandella
c

Question: Who coached the National Champions of the 2009-2010 season? Passage:The Badgers went into the 2009–2010 season picked 9th in the Big Ten. However, they upset the Arizona Wildcats and Maryland Terrapins in the Maui Invitational. On December 2, 2009, in a game on ESPN, Wisconsin shocked the #5 Duke Blue Devils (who would be the eventual National Champions). Leuer poured in 17 points on his way to scoring double digits in 13 of the first 15 games of the year. He followed up the effort against Duke with back-to-back double doubles at UW-Green Bay (a career high 26 points and 10 rebounds) and against Marquette University (24 points, 12 rebounds). He would also score 25 against UW-Milwaukee and 21 at Michigan State. Wisconsin was off to a surprising 13-3 start (3-1 in the Big Ten) after a 73-66 upset against #4 Purdue. However, Leuer had an off night against Purdue and only scored 4 points on 2-15 shooting. It was revealed after the game that Leuer had broken his wrist in the first half, yet still played 38 of the 40 minutes in the game. Leuer was ruled out indefinitely and he ended up missing the next 9 games.
 Links: a. Duke Blue Devils b. Duke Blue Devils c. Marquette University d. Purdue University

a