Mastic asphalt is A. Water proof B. Fire proof C. Elastic D. All the above

Therefore, the correct answer is D. All the above.

Here is a brief explanation of each option:

• Water proof: Mastic asphalt is a water-resistant material. This means that it can be used to create a waterproof barrier that will protect against leaks and moisture damage.
• Fire proof: Mastic asphalt is a fire-resistant material. This means that it can be used to create a fire barrier that will protect against fire damage.
• Elastic: Mastic asphalt is an elastic material. This means that it can withstand movement and deformation without cracking.