Which statement about identity NAT is true?

Which statement about identity NAT is true?

A.
It is a static NAT configuration that translates the real IP address on the ingress interface to the
same IP address on the egress interface.

B.
It is a dynamic NAT configuration that translates a real IP address to a mapped IP address.

C.
It is a static NAT configuration that translates a real IP address to a mapped IP address.

D.
It is a dynamic NAT configuration that translates the real IP address on the ingress interface to the
same IP address on the egress interface.