单选题 Which of the following condition is least likely to be the obstacle to the efficient allocation of productive resources:

A、

A. Price controls
B、

B. Taxes and trade restrictions
C、

C. Perfect competition

【正确答案】 C

【答案解析】Some of the obstacles to the efficient allocation of productive resources are: Price controls; Taxes and trade restrictions; Monopoly; External costs; External benefits; Public goods and common resources.