Detailed Instructions: 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.
Q: Question: Why did the Badger's head coach resign? Passage:The 2015–16 Wisconsin Badgers men's basketball team represented the University of Wisconsin–Madison in the 2015–16 NCAA Division I men's basketball season. This was Bo Ryan's 15th season as head coach at Wisconsin, before he resigned 12 games into the season. On December 15, 2015, Ryan announced he would retire effective immediately leaving associate head coach Greg Gard as interim head coach. The team played their home games at the Kohl Center and were members of the Big Ten Conference. They finished the season 22–13, 12–6 in Big Ten play to finish in a four-way tie for third place in conference. Shortly after the regular season, Greg Gard had the interim tag removed as he was announced as the permanent head coach. The Badgers were upset by Nebraska in the second round of the Big Ten Tournament. They received an at-large bid to the NCAA Tournament, their 18th straight appearance in the Tournament. They defeated Pittsburgh and Xavier to advance to the Sweet Sixteen for the third consecutive year. In the Sweet Sixteen, they lost to Notre Dame.
 Links: a. 2015–16 Big Ten Conference men's basketball season b. Bo Ryan c. Kohl Center d. 2015–16 Big Ten Conference men's basketball season
A:
b