() facilitates transactions between buyer and sellers by providing comprehensive information and ancillary services, but does not get involved in the actual exchange of goods or services between the parties.：A、utility modelB、incentive marketing modelC、subscription modelD、Metamediary Model
() facilitates transactions between buyer and sellers by providing comprehensive information and ancillary services, but does not get involved in the actual exchange of goods or services between the parties.
：A、utility model
B、incentive marketing model
C、subscription model
D、Metamediary Model
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