A Hypnotist Is Putting on a Demonstration, and Your Friend

A hypnotist is putting on a demonstration, and your friend Benjamin is thinking about volunteering. However, he is a little nervous because he is afraid he might do things while he is hypnotised that he would normally not do. Based on research into the effects of hypnosis, you should tell Benjamin

A) people will never do things under hypnosis that they would normally consider unacceptable.
B) people will often do things under hypnosis that they would normally consider unacceptable.
C) sometimes people will do things under hypnosis that they would normally consider unacceptable.
D) hypnosis doesn't really work, so he shouldn't bother volunteering.