Answer the following question given this paragraph: 

Courtesy of the U. S. EPA. Nitrogen and sulfur oxides combine with rain to form acid rain . Public Domain.


Q: What combines with rain to form acid rain?

 Choices:

- suction and sulfur oxides

- compost and sulfur oxides

- carbon dioxide and sulfur oxides

- nitrogen and sulfur oxides

A:
nitrogen and sulfur oxides
