​​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