What is a potential drawback to leaving VLAN 1 as the native VLAN?

A.
It may be susceptible to a VLAN hoping attack.

B.
Gratuitous ARPs might be able to conduct a man-in-the-middle attack.

C.
The CAM might be overloaded, effectively turning the switch into a hub.

D.
VLAN 1 might be vulnerable to IP address spoofing.