Which of the Following Differentiated the Postwar Era from Earlier

Which of the following differentiated the postwar era from earlier periods of prosperity?

A) a consumer culture in which a large number of people participated
B) the decline of the middle class but a surge in blue-collar income
C) the outlawing of labor unions, especially in industries such as steel
D) the emphasis of most Americans on saving money and rationing goods
E) the absence of financing innovations such as credit cards