With no explanation, chose the best option from "A" or "B". Dave and his friend Tony are at a restaurant, each with a plate of fries, when Tony gets up to go the bathroom. Dave wants to eat another fry.

A: Dave grabs a fry off his own plate and eats it happily.
B: Dave grabs a fry off of Tony's plate so that he can get some bonus fries for himself.
A.