What are two possible causes?

An Ethernet interface is up and the line protocol is down. What are two possible causes? (Choose two.)
A. There is a speed or duplex mismatch with the remote device.
B. There is a Layer 2 mismatch in the encapsulation type.
C. The Ethernet interface has been manually disabled.
D. Keepalives are not being received by the local device.
E. The Ethernet cable might not be attached properly.

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