Answer and Explanation:
In his speech, Sojourner Truth pointed to the exclusion of the cause of black women in emerging feminist movements. She says that feminist movements did not give space to black women, did not let them speak and did not address their problems. In that case she asked "Ain't I a Woman?"
Truth said she was prevented from speaking, by feminists, lest the feminist cause be confused with the black cause. According to her, this episode was very wrong, since white women claimed that feminist movements should seek to break the concept of women's fragility in relation to men, who forbade them to work and have freedoms. However, Truth affirmed that black women were never seen with fragility and never had freedom in the same way, being necessary that they also be included and heard.
The fourth answer; to get people to think.
1. Authority
Note the mention of "Nobel prize-winning scientist", which is generally the most prestigious scientists out there. What they say usually have authority and is believed by the ordinary people.
2. Emotion
First of all, how does the author know that the group is made up of "bigots". This is playing on the person's emotions, and trying to make them angry at their mistake, as well as give them a different group that they should look into.
3. Appeal to Logic
Note the usage of "make sense", as well as the building up of argument from the logical conclusion that "Diversity makes sense.. (via these reasons)".
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What is the effect of using the first person in "A Modest Proposal" by Jonathan Swift?
Readers are able to relate to the narrator's message.
Hope I helped!