Final answer:
Varsity Blues teams participate in U Sports and compete primarily in the Ontario University Athletics (OUA). The correct answer is b) Ivy League and OUA.
Step-by-step explanation:
The Varsity Blues teams participate in U Sports, which is the national sport governing body of university sport in Canada. The specific leagues that the Varsity Blues participate in are the Ontario University Athletics (OUA) and, for some sports, the Canadian Interuniversity Sport (CIS), which is now known as U Sports. Therefore, the correct answer to the question is b) Ivy League and OUA. The Varsity Blues teams participate in the U Sports league and the OUA (Ontario University Athletics) league.