In order to best understand an audience, it is a good idea to know their level of interest in your

In early "talkies," the major source of meaning was the music

Indicate whether this statement is true or false.

A speaker discusses the four basic food group model adopted by the Department of Agriculture in 1946

without mentioning the five-group model adopted in 1992. This speaker has violated the ethical responsibility to A) speak up about a topic the speaker considers important. B) choose topics that promote positive ethical values. C) use truthful, accurate supporting materials. D) let the audience know his/her motives for speaking.