In system modeling : A-Classification model; B-Stimulus-response model; C-Data processing model: 1-Here data-flow diagram show how data is processed at different stages; 2-Here object class/inheritance diagram show, how entities have the common characteristics;3-Here state transition diagram shows the how the system reader to internal and external events

• A. A-2, B-3, C-1
• B. A-3, B-1, C-2
• C. A-1, B-2, C-3
• D. A-1, B-3, C-2