Which of the following indicates a material may contain asbestos?

The age of a building is a significant indicator that may suggest the presence of asbestos-containing materials. Asbestos was widely used in construction up until the late 1970s and was often included in various building materials such as insulation, floor tiles, roofing, and cement-based products. Buildings constructed before this period are more likely to contain asbestos.

While the other factors may offer hints regarding the presence of asbestos, they are not as definitive. For example, the color of a material does not provide reliable information about asbestos content, as asbestos can be found in a variety of colors and types. Similarly, the presence of labels may indicate whether a material contains asbestos, but not all asbestos-containing materials are labeled, meaning reliance on labels alone can be misleading. The type of flooring may also suggest potential asbestos presence, especially if it is vinyl or tile flooring, but again, many flooring types do not contain asbestos, so this alone would not be a definitive indicator. Thus, age is a critical factor when assessing the likelihood of asbestos in a building.