Jill Was Trying to Operantly Condition Her Dog to Roll

Multiple Choice

Jill was trying to operantly condition her dog to roll over.Each time her dog rolled over she immediately said "good dog." However,the dog did not learn to roll over on command.Which of the following may best explain why?

A) Jill used inconsistent reinforcement.
B) The CS did not match the CR.
C) Jill should have delayed the reinforcement.
D) Saying "good dog" was not reinforcing to her dog.