Which of the following actions is crucial when dealing with hazardous materials in commercial driving?

Documentation of changes in quantity during a delivery is vital in the context of hazardous materials because it ensures accurate tracking and accountability of potentially dangerous substances. Proper documentation helps in maintaining compliance with laws and regulations governing the transportation of hazardous materials. It provides a clear record of what has been transported, including any discrepancies that may arise during transit. This transparency is crucial in case of an incident, such as a spill or accident, as it assists emergency responders in understanding the specific materials involved and their potential risks.

Additionally, thorough documentation also helps in identifying patterns or trends related to hazardous material management, which can be useful for both safety and efficiency in the long term. By keeping accurate records, drivers and carriers can proactively address any issues, ensuring both their safety and that of the general public are prioritized when handling hazardous goods.