c) 15th Amendment
The 15th Amendment, ratified during Reconstruction, granted African American men voting rights. Adopted in 1870, this amendment prohibited federal and state governments from denying a citizen the right to vote based on that citizen’s “race, color, or previous condition of servitude.” The 15th Amendment was a crucial step towards equality and enfranchisement for African Americans, although the implementation of this right was met with significant resistance, particularly in the Southern states.