单项选择题

在完全竞争厂商的长期均衡产量上必然有( ) A.
MR=LMC≠SMC,其中MR=AR=P B.
MR=LMC=SMC≠LAC,其中MR=AR=P C.
MR=LMC=SMC=LAC≠SAC,其中MR=AR=P D.
MR=LMC=SMC=LAC=SAC,其中MR=AR=P

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