Final answer:
A supervising driver must always sit in the front passenger seat.
Step-by-step explanation:
A supervising driver is not allowed to sit anywhere in the vehicle. In most jurisdictions, a supervising driver must always sit in the front passenger seat. This is because sitting in the front passenger seat allows the supervising driver to have a clear view of the road and be able to easily reach and control the steering wheel, brakes, and other important controls.