When You Hear Uncle Rico Dismissing Any Placebo Effect of Pain

When you hear Uncle Rico dismissing any placebo effect of pain relief as "all in the mind," you can set him straight by:

A) Stating that PET scans show that placebos activate opiate receptors
B) Arguing that placebo pain relief is just the same as hypnotic pain relief
C) Arguing that hypnosis can block placebo pain relief
D) Arguing that placebo pain relief is a physical process that can be abolished with an endorphin blocker