Consider a pharmacy that performs rapid tests to detect the presence of COVID$-19.$ Consumers arrive randomly, are served in a first come first serve fashion, and wait patiently until their turn arrives. The pharmacy currently has three employees.

If they were to add a fourth employee and train her to be as skilled as the others, what would be the impact on their operations?

Group of answer choices:

A$.$ Average waiting time will be reduced by less than $25\%.$

B$.$ Average waiting time will be reduced by exactly $25\%.$

C$.$ Average waiting time will be reduced by more than $25\%.$

D$.$ More information is needed to answer this question.