Answer:
There are two kinds of speakers in the world: those that are speaker-centered and those that are audience-centered. A speaker-centered person thinks only about his perspective and uses his beliefs and values as the focus of the speech. An audience-centered person makes his speech more enjoyable and entertaining.
Explanation:
The best way to know if you are focusing on your audience is to perform a formal analysis, and it's pretty in depth. The speaker makes a prescribed plan to scrutinize the audience's behaviors and uses the data to come up with conclusions about audience's preferences.
What is the source of the details—personal experience, experiments, scholarly sources, or facts?
I think its d - BUT I may be wrong - please let me know!