Which of the following pairs of events are mutually exclusive?

a. A = 5The Tampa Bay Rays win the World Series next year.6 B = 5Evan Longoria, Rays infielder, hits 75 home runs runs next year.6

b. A = 5Psychiatric patient Tony responds to a stimulus within 5 seconds.6 B = 5Psychiatric patient Tony has the fastest stimulus response time of 2.3 seconds.6

c. A = 5High school graduate Cindy enrolls at the University of South Florida next year.6 B = 5High school graduate Cindy does not enroll in college next year.6