Which of the Following Is True About Contexts for Communication

Which of the following is true about contexts for communication?

A) Communication can be influenced by the communicators' professional roles.
B) The communicators' personal contexts do not influence their communication.
C) The largest context in which business communication takes place is the organizational context.
D) The organizational context does not influence either external communication or the grapevine.
E) Customs and cultures have no effect on business communication.