Either B or C but I believe it is C
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.
Answer:
A
Explanation: right when a person look at an artwork, their expressions is first. Their facial expressions, will change when they look at something for the first time.