问题
单项选择题
Which of the following is least likely to be considered an obstacle to the efficient allocation of an economy's resources（）
A. Rent controls.
B. Minimum wages.
C. Changes in consumer tastes.
答案
参考答案：C
解析：
Price controls and taxes are obstacles to allocative efficiency. Rent controls and minimum wages are examples of price controls. As opposed to being obstacles to the efficient allocation of resources, changes in consumer tastes lead to the reallocation of society's resources, producing a different mix of goods or services that provide increased benefits.