In order to perform carbon-14 dating on an artifact, what must be true? A. The artifact cannot contain any radioactive elements.
B. The artifact must contain only other isotopes of carbon.
C. The artifact cannot contain carbon-14.
D. The artifact must contain carbon-14.

the answer is:

c. islam and christianity

explanation:

islam and christianity are widely practiced in africa. islam is practiced due to its spread from the middle east into africa, and christianity is practiced due to the colonization of africa by the british empire.

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