How far people stand from each other while talking is closely associated with their ______ .

A．maintain direct eye contact
B．hide emotions with a deadpan expression
C．display excitement or disgust, shock or sadness
D．raise their eyebrows, nod and smile politely

A．parents should be strict with their children
B．parental controls satisfy only the needs of the parents and the values of the community
C．parental restrictions vary, and are not always enforced for the benefit of the children alone
D．parents vary in their strictness towards their children according to the situation