Final answer:
The correct answer is C. Connect an ohmmeter across the main line. When troubleshooting a parallel circuit to find a short, it is important to disconnect the power supply and look for visible signs of damage.
Step-by-step explanation:
The correct answer is C. Connect an ohmmeter across the main line. When troubleshooting a parallel circuit to find a short, it is important to disconnect the power supply and look for visible signs of damage. However, connecting an ohmmeter across the main line is not necessary for finding a short in a parallel circuit.