How did southern states respond to the ratification of the Fifteenth Amendment?

In the late 1870s, the Southern Republican Party vanished with the end of Reconstruction, and Southern state governments effectively nullified both the 14th Amendment (passed in 1868, it guaranteed citizenship and all its privileges to African Americans) and the 15th amendment, stripping blacks in the South of the right to vote.

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The south didnt like the idea,  The Southern state governments effectively nullified it.

Explanation:

In the late 1870s, the Southern Republican Party vanished with the end of Reconstruction, and Southern state governments effectively nullified both the 14th Amendment (passed in 1868, it guaranteed citizenship and all its privileges to African Americans) and the 15th amendment, stripping blacks in the South of any rights.

answer; /// the correct answer is (a) burned the city;

can you explain it better