Waiters,barbers,and Bellhops Are Paid Primarily Through Tips Because _____

Waiters,barbers,and bellhops are paid primarily through tips because _____

A) their services are usually impersonal.
B) managers are better at judging their productivity than are consumers.
C) consumers can judge their productivity easily.
D) their services are usually immeasurable.
E) union regulations require this form of payment.