A. design model
B. analysis model
C. code levels
D. both design and analysis model
✅ The correct answer is option D.
Explanation: It is due to the evolutionary nature of the OO software engineering paradigm, these models begin as relatively informal representations of system requirements and evolve into detailed models of classes, class connections and relationships, system design and allocation, and object design.
Explanation: It is due to the evolutionary nature of the OO software engineering paradigm, these models begin as relatively informal representations of system requirements and evolve into detailed models of classes, class connections and relationships, system design and allocation, and object design.