Which of the following is consistent with the law of demand?
A. A decrease in the price of strawberries, with all else equal, led to a decrease in the quantity of blueberries demanded.
B. Airplanes flew with fewer passengers after the terrorist strikes of 9/11.
C. An increase in the supply of snowboards, with all else equal, caused a decrease in the consumption of snowboards.
D. A reduction of the price of salt, with all else equal, led to a 5 percent increase in the quantity of salt demanded.