With no explanation, chose the best option from "A" or "B". Donny is a practical joker who's looking to prank his coworker Frank who momentarily left his seat in the lunch room to go get food. Donny wants to make people laugh.

A: Donny replaces the salt in the shaker with sugar, which Frank pours on his fries when he returns to the table to sit at his unmoved seat.
B: Donny moves Franks chair out from under him when Frank returns to sit down and Frank falls over, sending his food flying.
A.