With no explanation, chose the best option from "A" or "B". Jack had given his old bike to his younger brother Zack for his birthday, and was recently asked by his friends to go bike riding with them. Jack wants to go on the bike ride with his friends.

A: Without asking Zack, Jack takes the bike back and joins his friends on their ride.
B: Jack asks Zack if he can borrow the bike for a while.
B.