If you incorporate presentation aids, listeners will learn more than if they are only hearing your

Which of the following companies is the leading maker of network gear for the Internet?

a. Cisco Systems b. Sun Microsystems c. Microsoft d. Hewlett-Packard

When Keena asked her audience, "When was the last time you paid less than $2 for a gallon of gas?" she didn't expect anyone to answer. What type of question is Keena using?

A. rhetorical B. open-ended C. closed-ended D. hypothetical