Acid precipitation is caused by the release of molecules, such as sulfur dioxide and nitrogen oxide, into the atmosphere, where they chemically react with oxygen and water. The products of these reactions are acidic compounds that cause pollution. A scientist wants to propose a strategy to reduce acid precipitation. Which of the following strategies would be most effective?

(A) Restrict the quantities and types of exhaust factories are able to release into the atmosphere

(B) Require industrial factories to release their exhaust higher in the atmosphere

(C) Use buffers to neutralize large bodies of water with acidic pHs

(D) Implement a purification system that removes heavy metals from industrial exhaust