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: Who did the Tar Hells defeat to win the ACC Tournament in 2007? Passage:Williams quickly reloaded the team with top talent, bringing in recruits like Brandan Wright, Ty Lawson, Wayne Ellington and Deon Thompson. The 200607 team tied as ACC regular season champions, earning the tiebreak over the Virginia Cavaliers. With the #1 seed, the Tar Heels won the ACC Tournament. After earning a #1 seed in the East Region in the 2007 NCAA Tournament, Williams' team won its first-round game against Eastern Kentucky Colonels 8665 and its second against Michigan State 8167. North Carolina then defeated the USC Trojans 7464 to advance to the Elite Eight. On March 24, 2007, North Carolina fell to the Georgetown Hoyas in overtime in the East Regional, ending its post-season run. Following the 20062007 season, Williams announced on July 18, 2007, that he had vertigo, a condition that occasionally forces him to sit down suddenly during games.
Links: a. 200607 Atlantic Coast Conference men's basketball season b. Michigan State Spartans men's basketball c. 2007 ACC Men's Basketball Tournament d. Virginia Cavaliers men's basketball
c