With no explanation, chose the best option from "A" or "B". Dave is planning a fishing trip on Sunday when he's told by his mother that she's throwing together a family gathering the same day. Dave wants to decide whether to cancel the fishing trip.

A: Dave tells his mom that since the fishing trip was planned first, it has priority, and he won't be able to attend.
B: Dave tells his mom that he'll cancel the fishing trip since family is more important to him, and he'll be there.
B.