Gerdie Volunteers for a Demonstration on Hypnosis

Gerdie volunteers for a demonstration on hypnosis. The hypnotist makes a series of suggestions to her, and she appears to enter a hypnotic state. The hypnotist then asks her to perform a series of silly behaviours, and she appears to willingly engage in these. The hypnotist then tells her to forget all that she did on stage. Later, she appears to have forgotten. Her forgetting is due to the effects of:

A) delusions induced by the hypnotist
B) post-hypnotic suggestions
C) unconscious forgetting
D) nothing; she really does remember