With no explanation, chose the best option from "A" or "B". Robin is a single mother who needs someone to babysit while she is out on dates. Robin wants her friend Penny to help her.

A: Robin invites Penny over to watch movies but when Penny arrives she makes up an emergency and asks Penny to babysit.
B: Robin asks Penny to help her with babysitting and offers to buy her dinner in exchange.
B.