问题
单项选择题
In a competitive market, the gains to society are maximized under which of the conditions described belowMarginal Benefit Marginal Cost Producer Surplus Consumer Surplus（） ①A. $1.25$1.00$25 $25 ②B. $1.50$1.50$45 $30 ③C. $2.50$2.50$35 $35
A. ①
B. ②
C. ③
答案
参考答案：B
解析：
In a competitive market, the efficient equilibrium quantity produced is the quantity where marginal benefit equals marginal cost and the sum of consumer and producer surplus is maximized.