Answer:
D) Increased automobile maufacturing
Step-by-step explanation:
Acid rain is caused by chemical reactions when oxides are released into the atmosphere. These oxides (such as sulfur dioxide and nitrogen oxide) mix with oxygen and carbon dioxide high up in the atmosphere and produce pollutants such as acid rain. Factories produce these in the smoke and pollutants they put out as they are producing, so the increased manufacturing of automobiles in factories such as these ones that pollute the environment would contribute the cause of acid rain.