Final answer:
The question asks about the minimum period a supervising driver must have held a Class C license, which varies by location and should be verified with local authorities.
Step-by-step explanation:
The question regarding the requirement for supervising drivers to have held at least a Class C license pertains to regulations, which can vary from region to region.
The question asks about the minimum period a supervising driver must have held a Class C license, which varies by location and should be verified with local authorities.
Generally, the rules about licensure are set by state or local authorities and can dictate the period a supervising driver must have held their license. Please check your local DMV or equivalent authority for the most accurate information for your specific location.