Which of the following statements about demand and consumer choice is least likely correct（）
A. The elasticity of demand for a good increases over time.
B. In the short run, if the price of gasoline increases, consumption of gasoline will decrease by a smaller percentage.
C. In the short run, if the price of a brand of flour increases, consumption of that brand of flour will decrease by a smaller percentage.
参考答案：C
解析：
One brand of flour likely has many good substitutes, and elasticity of demand is likely high. The other statements are true. Demand elasticity is greater in the long run than in the short run. The demand for gasoline is likely inelastic. Thus, when the price increases, the percentage change in quantity demanded is less than the percentage change in price. There are few substitutes for gasoline, especially in the short run. For goods that are complements, cross elasticity is negative.