How far people keep from each other while talking is closely associated with their

A．she meant him to turn down the invitation
B．it seems to have been a pure accident
C．it was a sign that Tuesday was inconvenient
D．it showed she was pleased to have been invited

A．Classification of nonverbal communication.
B．The reasons why people should think about space.
C．The relationship between communication and space.
D．Some other cultural aspects of nonverbal communication.