Research studying attitude change has focused on all of the following factors EXCEPT:

A) the communicator.
B) the message.
C) the context.
D) the audience.

Research on attitude change traditionally focuses on the communicator (who delivers the message), the message itself (what is said), and the audience (to whom the message is directed). The context, while it can influence the effectiveness of communication, is not typically listed as a primary focus in classic studies of attitude change.