Which of the Following Is Not an Assumption for the M/M/1

Multiple Choice

Which of the following is not an assumption for the M/M/1 model with finite population source?

A) There is only one server.
B) The population of units seeking service are finite.
C) Arrivals follow a Poisson distribution and service times are exponential.
D) Customers are served on a first come,first served basis.
E) The length of the queue is independent of the arrival rate.