Consider a system whose assumptions fit the waiting line model M/M/1. (The one that we looked at the formulas in class.) If the customer arrival rate is increased, but the service rate remains the same, which of the following is likely?

A. The average number of customers in the line decreases.

B. The average number of customers in the system decreases.

C. Customers move through the system more slowly because utilization is increased.

D. Customers move through the system in less time because utilization is increased.

E. Utilization is decreased because of the added strain on the system.