Which of the following can be inferred regarding what happened after the civil war?

In the question it asked which of the following but you don't list the following so this is my answer...

The end cause of the Civil War was the changing in the subject slavery.

Hope that halped.

(d) rivers.

explanation:

civilizations developed around rivers because their waters provided places to hunt and fish. also, as the rivers flooded, the lands around them became fertile. this allowed them to support farming. this is especially true of the nile river, which flooded the same time each year.