Regarding the description of LSA header information in OSPF AS -External C LSA, which is wrong?

Regarding the description of LSA header information in OSPF AS -External C LSA, which is wrong?
A . Link State ID indicates the destination network address
B . Forwarding Address is always 0.0.0.0
C . Advertising Router indicates the Router ID of ASBR
D . Net mask indicates the network mask of the destination network segment

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Answer: B