Automation System
In general, American buyers will purchase goods:

None of these
that are made in America, even at higher costs.
without regard to country of manufacturer.
(a) and (c)
that offer the best quality for the least money.

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Automation System
A process controller:

is useful in a continuous process control application
All of these
can interface to digital and analog I/O
None of these
can solve a PID process control equation easily

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