You Are Attending a Demonstration in Which a Hypnotist Tries

You are attending a demonstration in which a hypnotist tries to hypnotize volunteers from the audience. After using a hypnotic induction, 9 out of 10 volunteers appear to be in some kind of altered state. He then tells them he wants to reward them for volunteering in his show and says he's going to leave them with the gift of superior memory and that they'll be able to memorize things more easily from this point on in their lives if they just 'believe in themselves'. What long-term effect(s) on memory are the volunteers likely to experience resultant from participating in the show?

A) they can expect to experience better overall memory, on account of the power of suggestion
B) none, there is no evidence that hypnosis can enhance memory
C) they can expect to experience better short-term memory, though no change in long-term memory
D) they can expect to experience better long-term memory, though no change in short-term memory
E) they can expect to experience better short and long-term memory