With no explanation, chose the best option from "A" or "B". James is working away at his desk when Bill, his colleague comes over to ask for help him with a file. James wants to respond to Bill's request for help.

A: James tells Bill he doesn't have time as he's working on something and for him to ask someone else.
B: James tells Bill that he'll be over to help as soon as he just finishes up what he's working on.
B.