Which two statements about configuring an EtherChannel on a Cisco switch are true? (Choose two.)
A. The interfaces configured in the EtherChannel must be on the same physical switch.
B. The interfaces configured in the EtherChannel must operate at the same speed and duplex mode
C. An EtherChannel can operate in Layer 2 mode only.
D. The interfaces configured in the EtherChannel must be part of the same VLAN or trunk.
E. The interfaces configured in the EtherChannel must have the same STP port path cost
