Which One of the Following, A-D, Is Correct? If All

Multiple Choice

Which one of the following, A-D, is correct? If all are correct, respond E.

A) K₂SO₃ is a stronger base than KHSO₃.
B) K₂CO₃ is a weaker base than KHCO₃.
C) NaHSO₃ is a stronger acid than NaHSO₄.
D) Na₂HPO₄ is a weaker base than NaH₂PO₄.
E) All of these statements are correct.