问题详情

Whichofthefollowingargumentsabouttheefficiencyofmonopolisticcompetitioninallocatingresourcesismostaccurate？
A.Sinceeconomicprofitsinthelongrunarepositiveforfirmsinmonopolisticcompetition,thereareefficiencylosses.
B.Productdifferentiationundermonopolisticcompetitionoffersbenefitsthattendtooffsetinefficiencyfromthereductioninoutputcomparedtoperfectcompetition.
C.Advertisingexpendituresundermonopolisticcompetitionrepresentadeadweightlosstosociety.
请帮忙给出正确答案和分析，谢谢！