A virtual port channel （vPC） allows links that are physically connected to two different Cisco Nexus devices to appear as a single port channel to a third device. Which are the mandatory steps for configuring vPC？ （）
- A Enable feature vPC
- B Define domains
- C Establish peer keepalive connectivity
- D Create a peer link
- E Configure the peer link as a trunk port
- F Create port channels and vPCs
- G Define port channel load-balancing method
- H Make sure configurations are consistent