In the realm of voting rights, multiple constitutional amendments and landmark legislation have sought to protect the franchise for all citizens. One significant piece of legislation that aimed to address racial discrimination in voting practices was the Voting Rights Act of 1965. This Act was a direct response to widespread discrimination experienced by African Americans, particularly in the Southern states. While the Act aimed to eliminate practices like literacy tests and poll taxes, its effectiveness has been challenged in recent years by various state laws that proponents argue are necessary for election integrity. Which of the following provisions from the Voting Rights Act specifically aimed to curtail discriminatory practices and secure voting rights for African Americans?