About the descriptions of LSA of various messages, which is wrong?

About the descriptions of LSA of various messages, which is wrong?
A . The DD type LSA contains only the summary information of the LSA, that is, the LS Type, LS ID, Advertising Router and LS Sequence Number.
B . The LS Request message contains only the LS Type, LS ID, and the Advertising Router.
C . The LS Update message contains the complete LSA information.
D . The LS Ack packet contains the complete LSA information.

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Answer: D