Based on research by the National Center for Injury Prevention and Control in the U.S., approximately what percentage of adult Americans have experienced partner violence?

People usually use only one base of power to influence others

a. true b. false

When used in speech presentations, photographs, charts and maps

a. are poor choices as visual aids. b. should be passed around for all to see. c. tend to distort the meaning of the message. d. will usually be converted to slides.