With no explanation, chose the best option from "A" or "B". Carla is riding the bus home and one man is picking on another. Carla wants to find out what the trouble is.

A: Carla overhears that the man is picking on the other because of his skin color, so she steps between them.
B: Carla listens in to hear that the man is picking on the other because of his skin color, but she just sits quietly until her stop.
A.