Final answer:
A Licensed Residential Appraiser in North Carolina may have a maximum of three trainees at one time.
Step-by-step explanation:
The correct answer is C) Three.
In North Carolina, a Licensed Residential Appraiser is allowed to supervise a maximum of three trainees at one time.
This ensures that the licensed appraiser has the ability to provide adequate supervision and guidance to the trainees while still fulfilling their own responsibilities.