font size, font style, and typeface are all aspects of character formatting.
of the options given, your answer is a.) as long as you use it responsibly, it will enhance your slides and engage your audience.
why is this correct?
while aubrey may not enjoy using media, a visual aid is sometimes needed outside of text. even if it's sometimes a graphic or a chart, it does wonders to it make sense; especially with a mixed bag of people and i'd suggest you google it yourself as well. this means b is out. sayonara!
secondly, there must be a balance between media and text. too many images will, as aubrey believes, have an adverse effect on the presentation. so much as a caption on your photos is good. c is tonight's big loser.
finally, there is the split between a and d. what do we do now? both make some lick of sense, right? think again. media may entertain your audience, but that's not the point of presentations most of the time; it's to present information in both a graphical/verbal format without using a video. in fact, i'd say it's harder for a presenter to describe a photo on his own, meaning it will not take pressure off the presenter.
i hope my answer !