What did Adam Smith believe about self-interest and government regulation of the economy? A. He believed people should be allowed to pursue their own self-interest because it was necessary to support mercantilist economies. B. He believed governments should regulate people's economic activities to limit the harm caused by the industrialization of the economy. C. He believed governments should regulate people's economic activities to ensure that all people benefited from economic growth. D. He believed people should be allowed to pursue their own self-interest because doing so would create a collective benefit for the economy.