When selecting visuals, it is important to
a. include only black and white visuals.
b. enlarge some of the visuals so they have more impact.
c. add only the visuals that will make your paper look impressive.
d. choose only the visuals that are easily understood.

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.

B. looseimpressionist painters tried to stay far away detailed, realistic and smooth looks for paintings.