If a driver cannot account for students while loading, what should they do?

The correct response is to secure the bus and check around and underneath. This action is crucial because the safety of the students is the driver’s top priority. By securing the bus, the driver ensures that it is not in motion and prevents any potential accidents while they conduct their search. This includes checking around and underneath the bus to ensure that no students have inadvertently missed loading, potentially putting themselves in a dangerous situation.

Taking these steps demonstrates responsibility and adherence to safety protocols, which are vital when transporting children. The other options do not address the immediate safety concern effectively, as they may lead to a lapse in vigilance or could put students at risk.