Which is true about font use in presentation slides?

Question

Bright font colors should always be used.
Only one font size should be used.
Font size should be at least 24 point.
Font and background color should contrast

Answer 1

The statement that is true about font use in presentation slides is:

Font and background color should contrast.

Good contrast ensures that the text is easily readable against the background. It’s also generally recommended to use a minimum font size of around 24 points for readability, but using only one font size or bright font colors might not always be appropriate. Using multiple font sizes can help differentiate between headings and body text, and the choice of colors should consider readability and audience perception.