Final answer:
The statement is effective because it mentions specific ways the lives of African Americans have improved.
Step-by-step explanation:
The statement in the excerpt from "What Does American Democracy Mean to Me?" by Mary McLeod Bethune is effective because it mentions specific ways the lives of African Americans have improved.
Bethune highlights the progress made by African Americans, such as advancing from an illiterate population to a literate one and transitioning from being treated as property to being recognized as contributors to American culture.
By citing these specific examples, Bethune effectively communicates the positive impact of American democracy on the lives of African Americans.