Answer :
I would choose A because it seems like the best option and visuals are nice aids! hope i helped ;-)
The right answer is a. use visuals sparingly. People learn better from visuals and narrative than from words alone. This is because the brain has separate channels for processing visual and verbal materials, resulting in a higher level of understanding.
b. include as much text as possible - False - Use phrases or abbreviated sentences, rather than full sentences. Keep full sentences in your oral presentation and off the screen. Humans are incapable of reading and comprehending text on a screen and listening to a speaker at the same time. Therefore, lots of text are bad.
c. use a variety of colors on each slide - False - Attempt for simplicity and readability. Most PowerPoint templates contain distracting elements such as a variety of colors on each slide that can detract from your message.
d. never use the same font more than once - False - By limiting your fonts to two (at most), your presentation will have a consistent look and feel.