Asbestos was used in which of the following materials?

• A. Insulation
• B. Fire proofing
• C. Acoustical tiles
• D. All of the above

Answer: (D)

Asbestos has been used in a range of building materials because of its heat resistance and durability. In insulation, it helped reduce heat transfer and improve energy efficiency. As fireproofing, it was applied to structural elements to slow heat buildup and maintain integrity during fires. In acoustical tiles, it provided both fire resistance and sound-damping properties. Because all of these areas commonly incorporated asbestos, the best answer is that all of the above were used. This reflects how versatile asbestos was in construction, which is why recognizing these applications helps you understand why this choice is correct.