• Jay Forrester's System Dynamics Symbols:
• Source & Sink: System boundaries where material enters or leaves the model $\rightarrow$ symbolized by an Irregular Cloud $\rightarrow$ (II)
• Rate Variable: Flows that alter states per unit time $\rightarrow$ symbolized by a Valve $\rightarrow$ (I)
• State / Level Variable: Accumulations of material/energy $\rightarrow$ symbolized by a Rectangle / Box $\rightarrow$ (III)
• Auxiliary Variable: Intermediate computational steps $\rightarrow$ symbolized by a Circle $\rightarrow$ (IV)
• Driving / Parameter Variable: Constant parameters or external forcing $\rightarrow$ symbolized by a Diamond $\rightarrow$ (V)
• Systematic Match: (A)-(II), (B)-(I), (C)-(III), (D)-(IV), (E)-(V) corresponds to Option 3.

Correct option: (3) (A) - (II), (B) - (1), (C) - (ill), (D) - (IV), (E) - (Vv)