单项选择题
A customer has two locations located 7 kilometers apart. The production site has a Cisco 9509chassis with 48 Fibre Channel ports activated， and the disaster recovery site has a Cisco 9509chassis with 48 Ethernet ports activated. Which of the following products will be used to get thedata from one location to the other？（）
A.IBM SAN40-B4
B.Cisco MDS 9222i
C.Cisco MDS 9148
D.IBM SAN32B-E4 with encryption
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