With no explanation, chose the best option from "A" or "B". John's mother keeps listening in on his phone conversations with a girl. John wants to let his mother know he doesn't like her invading his privacy.

A: John calmly tells his mother that it's not okay for her to be eavesdropping on his conversations.
B: John loses his temper and yells at his mother to get of the phone line when he's on it.
A.