In Which of the Following Sequences of Sulfur-Containing Species Are

In which of the following sequences of sulfur-containing species are the species arranged in order of decreasing oxidation number for S?

A) SO₃^2-, SO₄^2-, S^2-
B) SO₄^2-, S₂O₃^2-, S^2-
C) S₂O₃^2-, SO₃^2-, S^2-
D) SO₄^2-, S^2-, S₂O₃^2-