Consider this equilibrium: HCO31- + H2PO41- HPO42- + H2CO3. What are the Brønsted-Lowry acids in this equilibrium?
A. HCO31- and H2CO3
B. HCO31- and HPO42-
C. H2PO41- and H2CO3
D. H2PO41- and HPO41-
E. HCO31- and H2PO41-