Answer the following question given this paragraph: 

Surface mining exposes minerals that were underground to air and water at the surface. These minerals contain the chemical element sulfur. Sulfur mixes with air and water to make sulfuric acid. This acid is a highly corrosive chemical. Sulfuric acid gets into nearby streams and can kill fish, plants, and animals. Surface mining is safer for the miners.


Q: What is corrosive mixture is formulated by the combination of water, air and sulfur?

 Choices:

- nitric acid

- sulfuric water

- hydrochloric acid

- sulfuric acid

A:
sulfuric acid
