Visually impaired audience members may appreciate a(n) ________ presentation aid.

In 2010, nearly one-quarterof all families in the United States were _________ families

a. nuclear b. step c. single-parent d. adoptive e. married without children

The temporal dimension of context is __________.

A. the sequence of the message B. a message's position within a sequence of events C. the tangible environment in which the communication takes place D. the vehicle through which messages pass