Some people from the age of Frederick Douglass believed that black people had less intellectual capabilities than white people and were therefore biologically determined to be worth less, which is why they should be slaves. Frederick Douglass was an abolitionist who fought against such prejudice and ignorance.
The one that is the best way to find the correct answer for a sentence completion question on a reading test is : c. look at the main parts or the paragraph and infer the answer
The main parts is basically the core of the content. If you find it, it would be really likely that you could answer a question about it
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