Which diagram best illustrates how the passage of the fifteenth amendment changed voting rights in the united states?

The correct answer is C. Race no longer barred citizens from voting. Therefore, African Americans were guaranteed the right to vote.

Explanation:

The Fifteenth Amendment is one of the post-Civil War amendments, known as the Reconstruction Amendments. This amendment prohibits the state or federal government from using a citizen's ethnicity, color, or previous status as a slave as a restriction on voting. Its basic purpose was to grant the right to vote to former slaves. But it wasn't really until the Voting Rights Act in 1965, almost a century later, that the full promise of the Fifteenth Amendment was in fact achieved in every state.

C. Race no longer barred citizens from voting.

Explanation:

The Fifteenth Amendment to the United States Constitution prohibits the government from denying a citizen's right to vote based on "race, color or previous condition of servitude." The passage of this amendment was very significant for African Americans, as it guaranteed their right to vote. However, in practice, states often found ways to restrict the right to vote of former slaves. Some of these strategies were poll taxes and discriminatory literacy tests.