Which of the following occurs as the level of service decreases?

A) Cost of waiting time decreases, and cost of providing service decreases.
B) Cost of waiting time decreases, and cost of providing service increases.
C) Cost of waiting time increases, and cost of providing service decreases.
D) Cost of waiting time increases, and cost of providing service increases.
E) Cost of waiting time first decreases, then increases; while cost of providing service decreases.

C