A broadbased study of elderly people who say that they have

A broadbased study of elderly people who say that they have never in their lifes suffered from serious insomnia reveals that they usually kept to regular sleeping schedules, going to sleep at about the same time every night and rising at about the same time each morning. Young people who wish to avoid serious insomnia into old age would therefore stand a good chance if they got to sleep at the same hour each night and rise at the same time each morning.

A flaw in the argument above is that it

A)fails to recognize that the pattern of behaviour beneficial to elderly people may not be similarly beneficial to young peolple

B)bases its conclusion on contradictory evidence

C)assumes that a condition which has had a certain result in the past will not have the same result in the future

D)fails to recognize that people may differ in what they consider to be "serious" insomnia

E)concludes that one condition is the cause of another when only a correlation has been established between them