Mike hurt his back and has to go to physical therapy every other day. He has a series of exercises he is supposed to do on the days he does not see the therapist. After two months, Mike was not feeling any better and complained to the therapist who at that point realized Mike was not performing all of the stretching exercises that he should be at this point in his rehabilitation. Mike had been handed a booklet when he started his therapy. Because he had only been instructed in how to perform some of the exercises in the booklet but not all of them, he had thought he was not to do the others. Mike feels like he has been wasting his time. The service provider has erred by:

A. Inadequate internal marketing communications

B. Inappropriate external marketing communications

C. Providing inadequate customer education

D. Under-promising and over-delivering

E. Inadequate management of customer expectations