Which statement is correct about the Cisco IOS Control Plane Protection feature?

Which statement is correct about the Cisco IOS Control Plane Protection feature?

A.
Control Plane Protection is restricted to the IPv4 or IPv6 input path.

B.
Traffic that is destined to the router with IP options will be redirected to the host
control plane.

C.
Disabling CEF will remove all active control-plane protection policies. Aggregate
control-plane policies will continue to operate.?

D.
The open-port option of a port-filtering policy allows access to all TCP/UDP based
services that are configured on the router.