What methods were used to keep blacks from exercising their constitutional rights? Easy Explanation People

Grandfather clause; tied the voter’s voting ability to whether or not their grandfather was able to vote (this was made to excuse poor white voters who could not read or pay poll tax)
literacy tests; targeted the fact that most African American people during this time could not read
poll taxes: basically a voting fee targeted the fact that most African Americans during this time period did not have a lot of money

The answer to your question would be b