When someone says, "That speaker really knows what they are talking about, they have incredible credentials" they are talking about which of the following?

Body movements, gestures and actions can serve as visual aids in a speech when

a. you have a PowerPoint presentation as a visual aid. b. use a chalkboard as a visual aid. c. use yourself as a visual aid. d. use a document camera as a visual aid.

Which one of the following is an acceptable option in a conclusion?

A. apologizing for inadequate preparation B. promising to give a better speech next time C. referring to the introduction D. discussing a new main point