Maurice Works for Logan Trainers,a Company That Provides Management Development

Maurice works for Logan Trainers,a company that provides management development workshops for businesses.Maurice is very popular and companies often ask for him by name,even though Logan has a lot of different instructors it could assign to workshops.Logan pays all instructors the same amount for teaching a workshop,but last week Maurice asked that he be given a higher rate of pay than the other instructors because he is so popular with companies.If the following facts were known,which one would MOST strengthen Logan's argument to keep Maurice at his current contract rate?

A) No one from Logan has ever directly observed Maurice's performance in presenting a workshop.
B) Maurice does not receive retirement benefits because he is not a full-time worker at Logan.
C) Logan has received very few applications from other instructors.
D) Logan uses a single-rate pay system for contingent workers.
E) There is no other agency in the city with whom Maurice could contract to provide similar workshops.