A _____ is logically impossible in a data flow diagram (DFD)because a process must act on input,shown by an incoming data flow,and produce output,represented by an outgoing data flow.

A _____ is logically impossible in a data flow diagram (DFD)because a process must act on input,shown by an incoming data flow,and produce output,represented by an outgoing data flow.
A) spontaneous combustion
B) gray matter
C) black hole
D) server farm


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