24. Mia: Are we still planning on Paris for our vacation next month?

Greg: That’s the plan. Are you having second thoughts?

Mia: Well, ________ what if we switched to London instead? The flights are a lot cheaper right now. 

Greg: Hmm, I wasn’t expecting that suggestion. But London could actually be fun.
(A) you must not forget this idea, but
(B) you might enjoy this idea, because
(C) you probably won’t like this idea, but
(D) you definitely will love this idea, because