B in P.E.

Girl has been down lately because she got all A's this quarter but for a B in P.E. I am truly torn as to how to approach this:

On the one hand, I don't want to play into any brains/ brawn baggage where I discount the P.E. grade.
On the other hand, the P.E. teacher seems like kind of a neanderthal. There seems to be LOTS of dodge ball and not much else.
On the other hand, this might be a good opportunity to practice the "I see that I keep getting B's in your class. How could I be doing better?" speech.
On the other hand, she's already prone to anxiety and I don't want her to get hung up on that kind of perfection.
On the other hand, there is a pizza party if you get all A's. This last seems an unworthy point, except that there are so few perks at our school, that I just feel like someone should throw her a bone.

Sooo, that's a lot of hands.