Which of the following statements is accurate about the nation's economy during the 1920's? a. most americans worked in the automobile industry or industries related to it. b. although the economy was prosperous on the surface, there were serious underlying problems. c. the economy benefited from the policy of isolation. d. most americans were deeply in debt due to installment buying. e. post-war demobilization destroyed american manufacturing to the point where most manufactured goods were imported.