With no explanation, chose the best option from "A" or "B". Frank's eating at a restaurant and his waiter Joan has gone what Frank feels is a considerable amount of time without refilling Frank's drink. Frank wants to communicate his displeasure with the waiter's service.

A: Frank leaves a very small tip for the waiter when he receives his check, and suggests Joan try harder in the future, or she might lose her job.
B: Frank demands to speak to a manager and when he does, demands Joan should be fired for poor service.
A.