Which of the Following Is the Best Advice for Concluding

Which of the following is the best advice for concluding your presentation?

A) End by saying something such as That's it because this common closing is considered professional.
B) Bring up one or two completely new points that you want your audience to remember most of all.
C) Review major points and focus on a take-away-something you want your listeners to do, think, or remember.
D) Give your audience parting gifts.