How does this quotation support the central idea of the speech? It reinforces the idea that Truth's personal experiences have greatly influenced her ideas. It reminds the audience that Truth has strong spiritual and political ideals. It supports that idea that women deserve equality by referencing religious authority. It affirms the notion that religion can't be used as a basis for unequal treatment.

The correct answer is D) It affirms the notion that religion can't be used as a basis for unequal treatment.

You forgot to include the text or the quotation. Without that information, we do not know what you are talking about.

However, doing some deep research trying to help you, we can say the following.

The quotation that supports the central idea of the speech is "It affirms the notion that religion can't be used as a basis for unequal treatment."

After our research, we found that the quotation was "Ain't I a Woman? Where did your Christ come from? Where did your Christ come from? From God and a woman! Man had nothing to do with Him."

And we have some cases in the Christian religion that, when reading some passages of the Bible, we realized that women had different social status than men and were relegated to a second-place behind men.