What is the best way to determine if an individual who claims to never dream does, in fact, have dreams?

    a.    Wake them up during NREM sleep and ask them if they have been dreaming.
    b.    Ask them about their dreams immediately after they wake up in the morning.
    *c.    Wake them up during REM sleep and ask them if they have been dreaming.
    d.    Ask them under hypnosis if they have had any dreams recently.