单选题
In a competitive market, the gains to society are maximized under
which of the conditions described below? Marginal
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
【正确答案】
B
【答案解析】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.