Regarding the LSA header information on the AS-External-LSA of OSPF, which of the following statement is incorrect?

Regarding the LSA header information on the AS-External-LSA of OSPF, which of the following statement is incorrect?
A . Link State lD represents the destination network address
B . Forwarding Address is always 0.0.0.0
C . Advertising Router represents the Router ID of ASBR
D . Net mask represents the net mask of the destination network segment

Answer: B