Which of the Following Was NOT Presented as a Guideline

Which of the following was NOT presented as a guideline for citing sources during a presentation?

A) After you state the quotation, explain why the material is important for members of your audience.
B) Your quotations should come from sources who are credible to your audience.
C) Wait until the end of the speech to list the sources of all your quotations.
D) Identify the source of the quotation out loud in the speech, just before or just after you read the quotation.