单项选择题

Medicine Directions
Take two tablets with warm water, followed by one tablet every eight hours, as required. For maximum nighttime and early morning relief, take two tablets at bedtime. Do not exceed six tablets in twenty-four hours.
For children six to twelve years old, give half the adult dosage. For children under six years old consult your doctor.
Reduce dosage if nervousness, restlessness, or sleeplessness occurs.
Clearly the medicine ______.

A.may be dangerous for small children
B.can’t be taken by children under twelve years old
C.may be taken by children but not by adults
D.may be taken by adults but not by children