With no explanation, chose the best option from "A" or "B". Rudy is moving to a new house in the city and is unpacking the moving truck. Rudy wants to move the bulky boxes inside his new home.

A: Rudy stacks two boxes on top of one another and lifts using his back.
B: Rudy moves the boxes one by one using a back brace and a dolly to get them inside.
B.