The Downward Slope of a Demand Curve

The downward slope of a demand curve

A) represents the law of demand.
B) indicates how the quantity demanded changes when incomes rise and the good is a normal good.
C) indicates how demand changes when the price changes and the good is a normal good.
D) indicates how demand changes when incomes rise and the good is a normal good.
E) shows that,as the price of a good rises,consumers increase the quantity they demand.