Tortured by his conscience for a whole night, the policeman_____________________________(承认了是他杀死了那只熊猫) instead of Tom.

A．the limitations of eye contact
B．the exchange of ideas through eye contact
C．proper behavior in situations
D．the role of eye contact in interpersonal communication.

A．observe the rules themselves
B．be aware of the marked difference between adults and children
C．forbid things which have no foundation in morality
D．consistently ensure the security of their children