单选题:邮政企业利用邮政的网络设施,开办信函、包裹、物流、金融等多种业务,是基于邮政行业存在(  )

题目内容:
邮政企业利用邮政的网络设施,开办信函、包裹、物流、金融等多种业务,是基于邮政行业存在(  ) A.规模经济性
B.范围经济性
C.生产的网络性
D.网络外部性

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Have you any rooms _______? We’ll stay here for only two day

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