Answering questions at the end of a presentation gives you a chance to

A) obtain important information.
B) build enthusiasm for your point of view.
C) emphasize your main ideas and supporting points.
D) all of the above.

Answering questions at the end of a presentation allows you to obtain important information from your audience and address any concerns they may have. It also gives you an opportunity to further emphasize your main ideas and supporting points, and potentially build enthusiasm for your point of view by addressing any doubts or objections. Therefore, all of the options listed are benefits of answering questions at the end of a presentation.