(Choose 1 answer)
Today, the two important data models are:
A. The relational data model (including object-relational extensions) and the semi-structured data model (including XML and related standards)
B. The semi-structured data model (including XML and related standards) and the network data model
C. The network data model and the flat file data model
D. The flat file data model and the semi-structured data model (including XML and related standards)
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