The Case of Miss M

The case of Miss M.,the woman who wouldn't sleep,is interesting because

A) although she slept little, she appeared to be healthy, productive, and well adjusted.
B) her lack of sleep had rendered her neurotic.
C) she had, with considerable effort, trained herself not to sleep.
D) her lack of sleep caused her have vivid hallucinations during the day.
E) brain damage had left her unable to sleep.