The correct statement that best compares the rhetorical devices used in the passages is:
Ain’t I a Woman? employs a rhetorical question, while the Declaration of Sentiments uses anaphora.
This is because "Ain't I a Woman?" prominently features rhetorical questions to emphasize the speaker's argument about women’s rights, while the "Declaration of Sentiments" employs anaphora to reinforce its points through the repetition of phrases.