Question: What do Data Flow Diagrams ( DFD ) model? a . A system as a set of states and state transitions b . A system

What do Data Flow Diagrams (DFD) model?
a.
A system as a set of states and state transitions
b.
A system as a set of processes and data flows
c.
A system as a set of objects and attributes
d.
A system as a set of functions

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