Acid rain is formed when sulfur oxides react with water in air. It causes lakes and streams decrease in pH which makes it unable to support fish and plant life. Which is the LEAST means of solving this problem?

• A. Limestone may be added to the water basins.
• B. Neutralize sulfur oxides with basic compounds.
• C. Reduction of sulfur emissions from the industrial establishments.
• D. Providing absorbent colloidal materials to screen acid rain before hitting the water.