Refer to the exhibit.The two connected ports on the switch are not turning orange or green. What would be the most effective steps to troubleshoot this physical layer problem？（）
- AEnsure that the Ethernet encapsulations match on the interconnected router and switch ports.
- BEnsure that cables A and B are straight-through cables.
- CEnsure cable A is plugged into a trunk port.
- DEnsure the switch has power.
- EReboot all of the devices.
- FReseat all cables.