Which two circumstances can cause a port to errdisable? (Choose two.)

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Which two circumstances can cause a port to errdisable? (Choose two.)
A . It is connected to a host with an NIC that is unable to recognize
B . It detected a collision.
C . The switch incurred a port security violation.
D . It detected a peer with a matching duplex.
E . It learned a new MAC address.

Answer: BC