For which type of cargo can pooled oil be most damaging?

Pooled oil can be particularly damaging to dry-vans due to the nature of their construction and intended use. Dry-vans are enclosed containers designed to transport goods that must remain dry and clean, protecting them from environmental factors. When pooled oil is present inside a dry-van, it can lead to contamination of the cargo, resulting in potential loss or damage to sensitive items such as electronics, clothing, or food products. Additionally, the oil can create difficult cleaning situations, leading to costly repairs and devaluation of the container itself.

Open tops, on the other hand, are designed to carry bulk cargoes like machinery or construction materials, which can tolerate some exposure to environmental elements. This makes them less susceptible to damage from pooled oil compared to dry-vans. Therefore, the unique characteristics of dry-vans make them more vulnerable to the negative impacts of oil contamination, justifying the selection of that answer choice.