What is a safe method to perform a continuity test on aircraft wiring to verify a conductor path without injuring avionics?

What is a safe method to perform a continuity test on aircraft wiring to verify a conductor path without injuring avionics?

• A. Power the circuit and measure voltage while energized.
• B. Use a magnet on wires to test continuity.
• C. De-energize, disconnect circuits, use a multimeter/ohmmeter to check near-zero resistance along intended path, inspect suspected breaks, and reassemble.
• D. Ignore safety and rely on trial and error.

Answer: (C)