The correct answer is C.
After World War II, millions of soldiers returned home from their service with the idea of starting families with their wives. Thanks to the GI Bill, these soldiers had the ability to receive financing for new homes. The need for new homes was met by designers like William Levitt, who developed suburbs all with similar looking houses.
These suburbs became wildly popular for former soldiers. However, these suburbs actually increased racial divisions between whites and African-Americans. These suburbs developed into communities that were based on wealth and race, leaving out African-Americans.