What is the best reason for why Sojourner Truth would say to the audience, "And ain't I a woman? Look at me! Lok at my arm!"

Truth is using this technique to force the audience to force the audience to see that she is a person a woman
Truth is using this technique because the audience doesn't think she authentic.
Truth is using this technique to show other woman that she's a female too
Truth is using this technique because she is angry

The best reason for why Sojourner Truth would say "And ain't I a woman? Look at me! Look at my arm!" to the audience is to force them to see her as a person and acknowledge her womanhood.