The word "precept" (Para. 3) probably means ______.

A．should encourage them to read before they know the meaning of the words they read
B．should not expect too much of them
C．should neither push them too hard nor leave them on their own
D．should create as many learning opportunities as possible

A．should be avoided
B．is universal among parents
C．sets up dangerous states of worry in the child
D．will make him lose interest in learning new things