How do you differentiate a ground fault from regular current draw in an aircraft electrical system?

How do you differentiate a ground fault from regular current draw in an aircraft electrical system?

• A. A ground fault is current returning through the normal circuit path.
• B. A ground fault is absence of any current.
• C. A ground fault has current returning through an unintended path to ground, often with insulation damage.
• D. A ground fault is only about voltage level.

Answer: (C)