How do "class" and "division" differ in TDG classification?

In the context of Transportation of Dangerous Goods (TDG) classification, the correct answer highlights the distinction between "class" and "division" effectively. Class represents broad categories of danger, such as explosives, gases, flammable liquids, etc. These categories provide a general overview of the types of hazards posed by substances. For instance, Class 3 includes flammable liquids, offering a wide-ranging grouping.

Division, on the other hand, provides a more detailed specification of the type of risk within that broad category. For example, within Class 3 (flammable liquids), different divisions can indicate varying degrees of flammability or conditions under which the materials may present a hazard, such as criteria for flash points. This structured system allows for more precise risk assessment and handling instructions, ensuring safety during transportation.

The other choices do not accurately represent the relationship between class and division. They misinterpret the nature of the classification system, particularly in terms of specificity and the criteria upon which the classifications are based. Understanding this distinction is critical for ensuring compliance with safety regulations and effectively managing risks associated with transporting dangerous goods.