By law, a child less than 4 may be legally positioned in the front seat if

• A. It is always allowed regardless of airbag
• B. The car has no back seats
• C. If the front airbag is turned off and rear seating is occupied by a child less than four years
• D. The child is seated using a seat belt only

Answer: (C)

Child passengers under a certain age must be properly restrained in the rear seat, using an appropriate car seat. An exception exists for placing a very young child in the front seat only under specific conditions: the front passenger airbag must be turned off, and the rear seating must be occupied by a child under four. When those conditions are met, it is legally permissible to have a child under four ride in the front seat.

This is why the scenario described in the correct answer fits: turning off the front airbag and having a rear occupant who is also a child under four meets the legal exception.

The other options don’t fit because they either ignore the airbag safety requirement, ignore the rear-seat occupancy condition, or rely on a restraint method (seat belt only) that isn’t appropriate for a child under four.