Which statements are correct about nonverbal communication？

Which statements are correct about nonverbal communication？
A.Nonverbal behavior is easily controlled
B.Asmilesometimesdoesn’t mean a sincere smile
C.Nonverbal behavior accounts for much of the meaning we derive from conversation.
D.Nonverbal communication is more than the complement of verbal communication.
正确答案：Asmilesometimesdoesn’t mean a sincere smile；Nonverbal behavior accounts for much of the meaning we derive from conversation.Nonverbal communication is more than the complement of verbal communication.