When a firm decides to produce more electric cars and conventional gas powered cars, it is most directly answering the ________ part of one of the two big economic questions

The phrase "a change in demand" most directly implies a

A) movement along a demand curve. B) movement along the price curve. C) change in the quantity demanded of a good. D) shift of the demand curve. E) movement along the quantity curve.

Market exchange assumes that _____

a. there are no monopolies b. prisoner dilemmas are nonexistent c. parties to the exchange have well-defined property rights d. the public sector is failing its job