The Slope of a Demand Curve Is Almost Always

Multiple Choice

The slope of a demand curve is almost always

A) positive, because when people buy more of a good the cost of producing it will rise.
B) positive, because the more money a person has, the more of a particular good will be bought.
C) negative, because when people buy more of a good the cost of producing it will fall.
D) negative, because with everything else equal, the same people will buy more of a good when its price is lower.
E) positive, because as the price rises, people want to sell more of the good.