A router has two FastEthernet interfaces and needs to connect to four vlans in the local network.How can you accomplish this task，using the fewest physical interfaces and without decreasing networkper formance？（）

A.Add two more FastEthernet interfaces.

B.Add a second router to handle the vlan traffic.

C.Use a hub to connect the four vlans with a FastEthernet interface on router.

D.Implement a router-on-a-stick configuration.

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