Which of the following is FALSE about two-part tariffs A When all consumers are identical, there is no deadweight loss. B When there are two types of consumers that cannot be distinguished, the firm should set a per-unit price below marginal cost. C When there are two types of consumers that cannot be distinguished, there is deadweight loss. D When consumers are identical, the firm sets a per-unit P = MC, and charges a lump-sum fee equal to consumer surplus