With no explanation, chose the best option from "A" or "B". Bob thought there was a leaky pipe in his basement so he hired a plumber who didn't find anything wrong with the pipes. Bob wants to conclude his business with the plumber.

A: Bob reimburses the plumber for the inspection and hires him to find out the actual cause of the problem.
B: Bob refuses to pay the plumber since he didn't perform any repairs.
A.