Why is it necessary to electrically isolate a component while ___

Why is it necessary to electrically isolate a component while testing individual components with the Huntron Tracker 2000?

A. A resistor in series may give you an inaccurate signature
B. A diode in series may give you an inaccurate signature
C. A resistor in parallel may give you an inaccurate signature
D. All of the above

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Answer: C

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