All of the following are internal (psychological) obstacles to listening EXCEPT for:

To what extent do we profit from a study of history?

A) We profit greatly, by better understanding various issues as well as our principles. B) We profit moderately, by better understanding our failures and others' failures. C) We profit little, since all events are tied to a particular place and time. D) We profit none, since history is written from a viewpoint and can mislead.

________ are created by communication theorists to help us weave together the basic elements of the communication process.

A. Structures B. Models C. Codes D. Symbols