Inefficiency can be caused in a market by the presence of

Declining cost industries

a. have upward rising AC curves. b. have upward rising demand curves. c. have ?-shaped total costs. d. have diseconomies of scale. e. have marginal cost curves below their average cost curve.

Who is associated with the following summary of the economic way of thinking: "The theory of economics does not furnish a body of settled conclusions immediately acceptable to policy. It is a method rather than a doctrine, an apparatus of the mind, a technique of thinking which helps its processer draw correct conclusions."

A. John Maynard Keynes B. Alfred Marshall C. Adam Smith D. President Harry Truman