With no explanation, chose the best option from "A" or "B". Sally's sister asks her if she can babysit their children that evening so that her sister can go out. Sally wants to give her sister an answer regarding Sally babysitting their children.

A: Sally says that she doesn't want to take on the responsibility of looking after her sister's children.
B: Sally says she's happy to watch her sister's children to let her sister go out and enjoy herself.
B.