Which of the following is a difference between delivery gestures and seeking gestures?

Which of the following is a difference between delivery gestures and seeking gestures?
 
  A) Delivery gestures signal shared understanding between communicators in a conversation, while seeking gestures request agreement or clarification from the sender during a conversation.
  B) Delivery gestures acknowledge another's feedback in a conversation, while seeking gestures indicate that another person can speak or are used to request to speak in a conversation.
  C) Delivery gestures are categorized under the contact codes of nonverbal communication, while seeking gestures are categorized under the visual-auditory codes of nonverbal communication.
  D) Delivery gestures are used when expressions do not have verbal referents in a particular language, while seeking gestures are used even when expressions have verbal referents.
  E) Delivery gestures are universal and do not change from person to person, while seeking gestures change based on the person, place, and time.