The correct answer is " It removed obstacles to voting, such as literacy tests and poll taxes."
In the Voting Rights Act of 1965, it discusses how any "tests" or "devices" that prevent American citizens from voting are now considered illegal. This was a huge change for African-American citizens, as many Southern states used these techniques in order to decrease African-American voter turnout. This resulted in a significant increase in the amount of African-American voters registered in states like Arkansas.