What Feature of the Brain Systems Involved in Producing Facial

What feature of the brain systems involved in producing facial expressions hints at the face's importance for emotion?

A) Without facial expressions, the brain cannot experience an emotion state
B) We have no voluntary control over our facial muscles, suggesting they are under the full control of the brain's emotion system
C) Facial muscles are ennervated exclusively by a direct connection from the hypothalamus, which is associated with emotion
D) Facial muscles are controlled by a distribution of cortical and subcortical areas, receiving indirect connections from systems associated with emotion