Question: An external entity in a DFD represents: a. a unit external to the system being designed b. unit outside the system being designed which can

An external entity in a DFD represents:

a.

a unit external to the system being designed
b.

unit outside the system being designed which can be controlled by an analyst
c.

unit outside the system whose behavior is independent of the system being designed
d.

a unit which is not part of a DFD

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