Explanation
Data modeling is the best answer, as this approach describes the concepts and relationships relevant to the solution or business domain.
Answer A is incorrect. The data flow diagram shows how information flows through a system.
Answer B is incorrect. The business rules analysis examines how business rules may be implemented and
managed in an organization.
Answer D is incorrect. Functional decomposition is the process of breaking down the scope into smaller,
more manageable deliverables. It ensures that all of the active characteristics of the proposed solution are identified, documented, and capable of being tracked.