Zoe, a nutritionist, is giving a presentation about childhood obesity to a group of teachers. She ends her speech with this statement: "We can do better. We must eat healthier and exercise. Will you join me?” This is an effective conclusion because it
A. leaves a lasting impression for the audience.
B. gives supporting details for the main idea.
C. establishes the main idea of the presentation.
D. gets the audience interested to hear more.