With no explanation, chose the best option from "A" or "B". Olivia is about to turn 12 years old and her mom is asking her what kind of party she wants. Olivia wants to have a slumber party.

A: Olivia invites all of the boys and girls in her class to her slumber party.
B: Olivia invites all of the girls in her class to her slumber party.
B.