Final answer:
The correct answer is Posthypnotic amnesia. This phenomenon occurs when a person under hypnosis does not remember certain events that occurred during the session.
Step-by-step explanation:
The correct answer is A) Posthypnotic amnesia. Posthypnotic amnesia is a phenomenon in which a person undergoing hypnosis does not remember certain events that occurred during the session. In this case, Rachel danced like Michael Jackson while hypnotized but has no memory of it. This is a common occurrence in stage hypnosis shows where participants may engage in activities that they would not normally do while under hypnosis.
It's important to note that hypnosis as portrayed in popular media and entertainment is different from the therapeutic use of hypnosis. Contrary to popular belief, individuals undergoing hypnosis usually have clear memories of the hypnotic experience and are in control of their own behaviors. While hypnosis may enhance certain cognitive processes, memory enhancements are typically modest in nature.