The M1 definition of money includes ______.

Comovement is

A) the tendency for declines in economic activity to be followed by further declines, and for growth in economic activity to be followed by more growth. B) the idea that the standard pattern of contraction—trough—expansion—peak occurs again and again in industrial economies. C) the tendency of many economic variables to move together in a predictable way over the business cycle. D) the idea that peaks and troughs of the business cycle occur at regular intervals.

A point inside a production possibilities curve indicates

A) resources are not being used efficiently. B) resources are being used very efficiently. C) opportunity costs are constant. D) an output combination that is unobtainable with the current resource and technology levels