Which of the following statements about Spanning Tree Protocol is true?

A. For the switches that are non-root or designated switches, the port with the highest combined cost to the root is the root port.

B. In the case where two switches have the same priority, the switch with the lowest MAC address becomes the root.

C. The switch port that is the greatest distance from the LAN to the root is the designated port.
D. All of the above.