Which two conditions must be met to establish a Layer 2 EtherChannel? (Choose two.)

Which two conditions must be met to establish a Layer 2 EtherChannel? (Choose two.)
A . SPAN must be disabled on the ports.
B . LAN ports in the EtherChannel must be contiguous.
C . The trunking protocol must be the same for all links in the EtherChannel.
D . All ports in the EtherChannel must be on the same module.
E . All ports in the EtherChannel must operate in half duplex.

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Answer: AC