Regarding the description of NAT Server, which of the following is correct?

Regarding the description of NAT Server, which of the following is correct?
A . If the public network address of the NAT Server and the corresponding public network interface address are in the same network segment, you do not need to configure black hole routing.
B. If the public network address of the NAT Server and the corresponding public network interface address are not in the same network segment, you do not need to configure black hole routing.
C. If the public network address of the NAT Server is an interface address, if a black hole route is configured for this address, service access to the firewall itself will be abnormal.
D. The NAT Server cannot be configured on the virtual firewall for users of the root firewall.

Answer: A