Which statement about transporting pesticides is true?

An enclosed cargo box provides significant protection for pesticides during transportation, which is crucial for safety and compliance with regulations. These boxes minimize the risk of leaks and spills, protect the contents from environmental factors like temperature fluctuations and direct sunlight, and help contain any accidents that may occur while on the road. While enclosed cargo boxes may not always be practical for every type of transport, they are considered the safest option for handling hazardous materials such as pesticides.

The other statements present practices that are not aligned with safety regulations or best practices in the transportation of hazardous substances. For instance, carrying hazardous pesticides in the passenger compartment raises safety concerns and is generally against guidelines. Proper training for operators of vehicles transporting hazardous materials is also mandated by regulations, and leaving a vehicle unattended does not absolve the operator of responsibility in the event of a spill or accident.