Which two statements about configuring an Ether Channel on a Cis

Which two statements about configuring an Ether Channel on a Cisco switch are true?(Choose two)

A.The interfaces configured in the Ether Channel must have the same STP port path cost

B.The interfaces configured in the Ether Channel must be on the same physical switch

C.C. An Ether Channel can operate in Layer 2 mode only The interfaces configured in the Ether Channel must operate at the same speed and duplex mode

D.E. The interfaces configured in the Ether Channel must be part of the same VLAN or trunk

正确答案是BD