Which statement about sulfur is false?

A) Sulfur is often a limiting factor for organismal growth.
B) On a time scale of centuries, volcanic eruptions and dust from bare soils each account for approximately the same amount of sulfur that is emitted into the atmosphere.
C) Most of the anthropogenic emissions of sulfur come from the burning of coal and oil and the refining of ore from mining.
D) One negative consequence of the anthropogenic changes to the sulfur cycle is increased acidity of rain.