The answer is D. All of the above, as different changes in the environment can lead to many different things.
Following the U.S. Civil War, the Radical Republicans attempted to put a land reform through Congress, promising, 40 acres and a mule, to newly-freed blacks in the South, which was rejected by moderate elements as socialistic. This failure left blacks without an economic base, and was one of the key contributing factors to the development of sharecropping and segregation.
The ancient Egypt workers were paid in products, such was grain becuase gold and metal would be scarce if they were all paid with gold.
It murdered thousands of innocent people, turned into an illiberal mess of collectivist radicalism disguised as enlightenment, produced a military dictatorship, ended with complete and total military failure, and resulted in the Bourbon Monarchy being restored.