In troubleshooting a circuit in a console, you find that a resistor may be faulty. Which of the precautions listed must be observed when using an ohmmeter to carry out this test? A. Correct polarity must be observed, connecting the red lead to the banded end of the resistor. B. Meter leads must be twisted to cancel the leads' magnetic fields. C. The meter must be placed in series with the resistor and the circuit. D. The resistor's circuit must be de-energized and at least one end of the component isolated.