You Are Worried That Someone in the Audience Will Ask

You are worried that someone in the audience will ask a question during the presentation, so you start by telling the audience that you will not be taking questions until the end of the presentation. After ten minutes, however, a member of the audience interrupts with a question. Which ONE of the following would be the best course of action?

A) Reminding the member of the audience that the time to ask questions is at the end of the presentation.
B) Ignoring the question and carrying on. It was, after all, very rude of the member of the audience to ask a question when you had told them not to, so there is nothing wrong with ignoring that person.
C) Answer the question anyway. It must be something that the person really wants to know if they have interrupted after being asked not to and it will not be too much of an interruption to answer one question.
D) Tell the member of the audience that they are very rude to interrupt when you have asked them not to and demand that they leave the presentation immediately.