What size font is appropriate for most on-screen presentation slides?

A) 10 to 12 point
B) 16 to 18 point
C) 20 to 24 point
D) 28 to 36 point
E) 36 to 48 point

D)Use both uppercase and lowercase letters, with generous space between lines of text, and limit the number of fonts to one or two per slide. Choose font sizes that are easy to read from anywhere in the room, usually between 28 and 36 points, and test them in the room if possible.