The conceptual model is the highest level of abstraction in an enterprise data model, focusing on business entities and relationships without technical details. The DAMA-DMBOK states: “The conceptual data model is the highest level of abstraction, defining key business entities and their relationships to support enterprise-wide understanding” (DMBOK2, Chapter 5: Data Modeling and Design, p. 175).
Options A, B, C, and E are either not data models (e.g., B) or represent lower abstraction levels (e.g., C, subject area model, is a subset of the conceptual model).
[Reference:DAMA-DMBOK2, Chapter 5: Data Modeling and Design, Section 3.1, p. 175., ]
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