The 13th, 14th and 15 amendments most impacted the rights of which group

African american  

Explanation:

13 was that slave were illegal 15 was any race that is born in the us can vote

Black People

Explanation: The 13th Amendment abolished slavery in 1865. ... The 14th Amendment (1868) guaranteed African Americans citizenship rights and promised that the federal government would enforce “equal protection of the laws.”The Fifteenth Amendment (Amendment XV) to the United States Constitution prohibits the federal government and each state from denying a citizen the right to vote based on that citizen's "race, color, or previous condition of servitude"

answer; nonpartisan election;