The correct answer is: A. Add clip art only if it relates to your topic
When an image is selected, a toolbar appears with options to resize, crop, rotate, and add effects to the image. There is also an option to add a caption to the image. However, there is no option to add clip art only if it relates to your topic.
Option B is incorrect because there is no need to place at least one clipart image per slide. It is more important to use images that are relevant to your topic and that will help to illustrate your points.
Option C is incorrect because there is no need to resize the image so it takes up as much space as your text. The size of the image should be appropriate for the slide and should not interfere with the readability of your text.
Option D is incorrect because only option A is correct.