Yolanda was looking forward to giving her informative speech because she liked her topic—her hometown. However, when she gave the speech the audience seemed disinterested; she couldn't understand why she got such negative audience feedback

Given this information about the situation, what was Yolanda's mistake?
a. She violated several ethical principles of public speaking.
b. She didn't have enough research and statistics in the speech to make it interesting.
c. She confused the roles of speaker and listener.
d. She was speaker-centered rather than audience-centered in her topic selection.

d