Laura is in the middle of making a presentation. On one slide, she includes a heading, three subheadings, and three bullet points that consist of key phrases. How should Laura help the audience distinguish between, or emphasize, the heading, subheadings, and key phrases in the body text? A. use contrasting font sizes, but the same font style
B. delete the headings and subheadings, and just keep the phrases
C. use different font styles and colors for each bullet
D. animate all three elements to appear one after the other