Billie received a series of email messages from an address with which she was not familiar. She tried to track down the sender, but could not determine who he or she was

When using testimony, public speakers must be certain to __________.

A. avoid paraphrasing, especially for technical material. B. use authorities most people have never heard of C. double-check quotations for accuracy and do not use them out of context. D. use at least two experts per main point in your speech

Discuss strategies you could use to gain the attention of your audience. 

What will be an ideal response?