What Is Suggested by the Facial-Feedback Hypothesis

What is suggested by the facial-feedback hypothesis

A)  Facial muscles send signals to the brain that help the brain recognize the emotion that one is experiencing. 
B)  After experiencing an emotion, the brain transmits signals that result in the facial muscles "matching" the emotion. 
C)  Feedback from another person's facial expression allows individuals to correctly label emotions. 
D)  All cultures have identical facial expressions that indicate specific emotional states.