Which of the following is NOT a typical "defensive" containment strategy?

The option identified as the correct answer refers to a strategy that is not typically categorized as a "defensive" containment method. In hazardous materials incidents, containment strategies are divided into "defensive" and "offensive" approaches. Defensive strategies aim to prevent the spread of the material and minimize safety risks without directly attacking the source of the hazard.

The diking method involves creating barriers around the spill to contain the material and prevent it from spreading further. This is a classic defensive tactic that effectively limits exposure and manages the hazard presented by the material.

Diverting also falls under defensive measures, as it entails redirecting flowing hazardous materials away from sensitive areas, further reducing the area of potential impact.

Dilution involves mixing the hazardous material with water or another substance to lower its concentration, which can sometimes help mitigate immediate dangers. However, this is usually more aligned with an active response strategy than a purely defensive one.

In contrast, transferring hazardous materials implies moving them from one location to another. This approach is generally considered more active and carries inherent risks, particularly if the transfer is not executed under strict controls, making it inconsistent with the typical objectives of defensive strategies. Hence, it is correctly identified as not fitting the defensive containment category.