The answer is (d.) choose only the visuals that are easily understood.
The main purpose of the visual aids is to help improve the understanding of the audience to the presentation. It clarifies and reinforce the key points of the topic. So it's important to choose the appropriate visual that could help the presentation easily understood.
I think that the answer is D. This makes the most sense because the Egyptians were very into creating Spiritual art, and I am positive that is one of the answers. Moral is just the other one that makes the most sense to me.
