Following the russian revolution, the soviet union adopted communism, a system a. was driven by consumer demand. b. gave people a vice in the government. c. controlled nearly all of the economic and political decisions. d. privatized industry.

d is the logical answer but im not a 100% sure

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.