The following descriptions about Link ID, Data, Type and Metirc in Router-LSA, which are correct? (Multiple Choice)

The following descriptions about Link ID, Data, Type and Metirc in Router-LSA, which are correct? (Multiple Choice)
A . Metric describes the cost of this connection
B . Link ID indicates the local identification of this connection, and different connection types indicate different meanings of Link ID
C . Data is used to describe the additional information of this connection, and the information described by different connection types is also different
D . Type indicates the type of connection

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Answer: ABCD