Place the Following Stages of the Hydrogen Ion Elimination and Bicarbonate

Place the following stages of the hydrogen ion elimination and bicarbonate conservation in the proximal tubules of the nephrons in the ascending chronological order. Use all the options.

A) ^CO2 ^{and H}2^{O are produced.}
B) H⁺ is secreting into the tubular fluid.
C) Carbonic acid is produced.
D) H⁺ combines with filtered HCO ^-.