All school buses and vehicles hauling passengers for hire must carry a fire extinguisher of at least what capacity?

Answer: B — One quart

The correct capacity for fire extinguishers required on school buses and vehicles that are engaged in transporting passengers for hire is one quart. This requirement is in place to ensure that in the event of a fire, there is an appropriate level of firefighting equipment readily available to address small fires before they escalate. Fire extinguishers are essential safety devices, and having one of at least this capacity helps to provide a reasonable means of combating small fires that may occur during transit. While larger capacities exist, like two quarts or one gallon, the minimum requirement set by safety standards specifies one quart as sufficient for the intended use on these types of vehicles. It is vital for drivers and operators to comply with these regulations to ensure safety for all passengers.