Your Roommate Swears He Never Dreams

Multiple Choice

 Your roommate swears he never dreams. How might you prove differently to him?

A) Buy him a dream catcher and hang it by his bed.
B) Keep him awake for 48 hours and then he would remember his dreams.
C) Have him concentrate on something he wants to dream about before he goes to sleep, and then see if he remembers dreaming when he wakes up.
D) Watch him sleep, and when his eyes begin to move under his closed eyelids, wake him up, and he will probably realize he was dreaming.