Which security measure must you take for native VLANs on a trunk port?

Which security measure must you take for native VLANs on a trunk port?

A.
Native VLANs for trunk ports should never be used anywhere else on the switch.

B.
The native VLAN for trunk ports should be VLAN 1.

C.
Native VLANs for trunk ports should match access VLANs to ensure that cross-VLAN traffic from multiple switches can be delivered to physically disparate switches.

D.
Native VLANs for trunk ports should be tagged with 802.1Q.