The correct answer is D. Literacy tests were banned by the Voting Rights Act of 1965.
The Voting Rights Act of 1965 is a historic law within the United States since it prohibited discriminatory practices in the right to vote for African-Americans. This law achieved, after almost 100 years of the Fifteenth Amendment to the Constitution of the United States (which prohibits any type of discrimination based on race or color of citizens) the constitutional right to vote being protected because until that time there were States that required literacy tests or the payment of some tax, using these resources to limit the right to vote of black people. This law was promulgated by President Lyndon B. Johnson, who had already enacted the Civil Rights Act the previous year.
