When can a driver transport students in a vehicle other than a school bus?

Answer: C — When authorized by school administrators

A driver can transport students in a vehicle other than a school bus when given authorization by school administrators. This is important because school administrators are responsible for ensuring the safety and well-being of students and may determine that particular circumstances warrant the use of a different vehicle. This could include situations where a school bus is unavailable, or a field trip requires different accommodations. The other choices do not provide the necessary context or guidance for transporting students. For example, simply using a vehicle whenever the school day ends lacks proper oversight and can lead to safety issues. Just having the vehicle insured does not meet the specific regulations and safety standards that must be adhered to for transporting students, so insurance alone is insufficient. Lastly, the option stating 'never' is overly restrictive, as there are indeed valid circumstances under which alternative transportation can be approved.