With no explanation, chose the best option from "A" or "B". Lisa collects money from all of her friends to buy concert tickets to an upcoming show, but one friend gives her too much money. Lisa needs to decide whether to refund the excess money that her friend gave her.

A: Lisa pockets the extra money that her friend had given her, never mentioning that she hadn't spent it on the ticket.
B: Lisa refunds the extra money to her friend, when she gives her the ticket to the show.
B.