Which Statement Is Most Correct Concerning Volcanic Effects on Our

Which statement is most correct concerning volcanic effects on our atmosphere?

A) Active volcanism is responsible for maintaining atmospheric levels of nitrogen.
B) Gases from volcanoes condense to make natural fertilizer, boosting plant growth.
C) If it were not for active volcanism there would be no free oxygen in the atmosphere.
D) Pollution of the atmosphere by sulfur compounds contributes significantly to acid rain.

Correct Answer:

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