单项选择题

The components of the e-commerce system includes ________.

A.the network platform, buyers and sellers, certification center, payment center, logistics center, customer service center, and e-commerce service providers
B.the network platform, buyers and sellers, certification center, payment center, logistics center, and e-commerce service providers
C.the network platform, certification center, payment center, logistics center, and e-commerce service providers
D.the network platform, buyers and sellers, certification center, payment center, and logistics center
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