Answer:
C. 15th Amendment
Step-by-step explanation:
The 15th Amendment of the united states of America says that states or Federal government could not deny the citizen's right to vote based on their Color, Race and previous condition of service.
African American given right to vote and 15th Amendment of united states protected their Right to vote, the voting is precious it is sacred it is the most powerful non-violent tool to fight with the oppression of the ruler it is the Democratic tool of the society which we have got it by the 15th Amendment.