The contributions of the ancient civilizations of Ghana, Axum, Kush, and Mali demonstrate that a
industrial technology was needed for African civilizations to develop
b
many African civilizations developed in southern Africa
c
advanced societies developed in Africa before Europeans colonized this region
d
most of the African Continent was unified under a single political system

C

Explanation:

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regarding the law, the 15th amendment was specifically designed thinking in the rights of black free men.

even though ratified on february 3, 1870, the promise of the 15th amendment would not be fully applied for a long time.poll taxes and literacy tests would allow southern states disenfranchise african americans. only in 1965 the voting rights for african americans would be actually able to vote in the south.

in 1965, president johnson signed the voting rights act, which aimed to overcome legal barriers that prevented african americans from voting as it was guaranteed by the 15th amendment to the u.s. constitution.

c)an idealized view of nature. hope this