With no explanation, chose the best option from "A" or "B". John's daughter Kara asked for a new pair of expensive sneakers, but she has been falling behind in her schoolwork. John wants to act on Kara's request.

A: John thinks that if he buys Kara what she wants that her grades might improve, so he makes the purchase despite her poor performance in school.
B: John tells Kara that if she can bring her grades up, he will buy them for her.
B.