Why D?

@lerondagates Thanks for your question. (D) states "What people recall under hypnosis depends to at least some extent on suggestion." This is correct and is supported by the passage's account of subjects who were asked to describe a film (which they had not seen) and a musical piece (which they had listened to) having "equally confident and detailed" recollections. Therefore, suggesting that a subject had seen a film while under hypnosis has some type of an impact on that subject's recollection of what happened while they were under hypnosis, as evidenced by the fact that those subjects confidently described the suggested film rather than the musical piece they had heard. Does this help? Let us know if you have additional questions!

Wow, that makes sense now. I missed the "which they had not seen". Thanks for the explanation.