If price elasticity of demand is 2.0, this implies that consumers would ( )
选项：

A:buy twice as much of the good if price falls by 10 percent.;
B:require a 2 percent cut in price to raise quantity demanded of the good by 1 percent.;
C:buy 2 percent more of the good in response to a 1 percent cut in price.;
D:require at least a $2 increase in price before showing any response to the price increase.