Which Form of Sulfur Can Algae and Plants Use but Not

Multiple Choice

Which form of sulfur can algae and plants use but not produce?

A) hydrogen sulfide (H₂S)
B) elemental sulfur (S⁰)
C) sulfuric acid (H₂SO₄)
D) sulfate (SO₄²⁻ )
E) both elemental sulfur and hydrogen sulfide