Emotions Are a Form of Social Communication in That

Emotions are a form of social communication in that:

A) they provide observable information about our internal states and intentions,thereby influencing how other people behave toward us.
B) they have been shaped by evolutionary survival influences so that one's emotional expressions serve to focus others' attention and actions on the events that caused the emotion.
C) they reflect the thoughts we have but cannot express in words.
D) they are distinct from the behavioural tendencies they evoke.