The Evidence from Numerous Studies on the Effectiveness of Melatonin

Multiple Choice

The evidence from numerous studies on the effectiveness of melatonin indicates that

A) melatonin consistently reduces the effects of jet lag.
B) melatonin consistently enhances the effects of jet lag by resynchronizing the biological clock in the wrong direction.
C) melatonin can be used to reduce jet lag if the dose is given at the right time.
D) melatonin can be used to reduce jet lag if the right dose is taken.