The probability that a randomly selected participant is an adult prefers comedies is symbolized by P(C ∩ D).

The symbol ∩ represents the intersection of two events, meaning both events happen. So P(C ∩ D) is the probability that a participant is in group C and group D—in this question, an adult who prefers comedies. The correct choice is “and.”

AI-written and checked against the verified answer.