What is the controversy surrounding the nature of hypnosis as presented in the module?
a) There is no controversy, as hypnosis is universally accepted as a state of altered consciousness.
b) The controversy revolves around whether hypnosis represents a distinct state of consciousness or simply an extension of normal cognitive processes.
c) The controversy stems from disagreements about the effectiveness of hypnosis as a therapeutic tool.
d) The controversy primarily concerns the legality of using hypnosis for medical purposes.