what were some of the negative actions taken against African Americans in response to the Fifteenth Amendment

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Explanation:

The Fifteenth Amendment had a significant loophole: it did not grant suffrage to all men, but only prohibited discrimination on the basis of race and former slave status. States could require voters to pass literacy tests or pay poll taxes -- difficult tasks for the formerly enslaved, who had little education or money.

For more than 50 years, the overwhelming majority of African American citizens were reduced to second-class citizenship under the “Jim Crow” segregation system.

i think it's b

the answer is going to be c