Which of the Following Statements About Dement and Kleitman's Study

Which of the following statements about Dement and Kleitman's study is false?

A) Some participants had no eye movements even though they were in REM and were dreaming
B) The eye movements generally matched the content of the dream
C) Sometimes participants woken from NREM sleep could not recall a dream but could recall a mood or feeling
D) On some occasions participants woken from REM sleep did not recall dreaming
E) Participants found it very difficult returning to sleep after being woken