Which two structural materials are classified as potentially carcinogenic?

The correct choice identifies lead and asbestos as potentially carcinogenic materials. Lead exposure is linked to various health issues, including cancer, particularly in occupations involving lead paint or plumbing materials. Asbestos is well-known for its carcinogenic properties; inhaling asbestos fibers can lead to serious conditions such as mesothelioma and lung cancer. Both of these materials have been subjects of concern and regulation due to their risks to human health when improperly handled or disturbed, especially in older structures.

The other options contain materials that do not carry the same level of carcinogenic risk. Brick and concrete are generally considered safe in terms of cancer risk, while wood and glass are materials that are widely used and do not present carcinogenic properties under normal circumstances. Metal and plastic also do not typically fall into the category of carcinogenic materials, with most metals and plastics being safe when used appropriately. Understanding the risks associated with different materials is crucial for restoration professionals working in environments that may contain hazardous materials.