What is the potential drawback to leaving VLAN 1 as the…

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

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

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

C.
VLAN 1 might be vulnerable to IP address spoofing

D.
It may be susceptible to a VLAN hopping attack