Answer the following question given this paragraph: 

Sulfuric acid is produced in extremely large quantities in the United States (about 40 million tons/year). This material is manufactured by oxidizing sulfur to form sulfur trioxide. The SO 3 is then dissolved in water to form the sulfuric acid. Most of the sulfuric acid produced is used in fertilizers. This acid is also found in lead-acid car batteries.


Q: What is sulfur trioxide dissolved in to form sulfuric acid?

 Choices:

- silver

- mercury

- lead

- water

A:
water
