Gillian prepared beautiful photographs in PowerPoint to illustrate various parts of her speech about the Grand Canyon. When Gillian finished explaining each photograph, she left it on the screen for her audience to study until it was time for the next slide. Did Gillian make any mistakes in her use of visual aids?

A. Yes. She should have displayed blank slides between the photographs.
B. No. Keynote is an excellent way to display photographs.
C. Yes. Photographs usually don’t require explanations when used as visual aids.
D. No. She explained her visual aids to the audience as the book recommends.