The Practice of Diagnosing People as Neurotic Pseudoinsomniacs Stopped When

The practice of diagnosing people as neurotic pseudoinsomniacs stopped when it was discovered that many people

A) who complain of insomnia sleep for over 6.5 hours per night.
B) who complain of insomnia sleep most of the night but unknowingly suffer from sleep apnea, nocturnal myoclonus, or some other sleep-disturbing disorder.
C) become neurotic because of their insomnia, but not vice versa.
D) become an insomniac as a result of their neuroses, but not vice versa.
E) who complain of insomnia get little sleep.