Regarding renal compensation in respiratory acidosis and alkalosis:

• A. the rate of HCO3 reabsorption is inversely proportional to the arterial PCO2
• B. in respiratory acidosis, HCO3 reabsorption is reduced
• C. changes in plasma chloride concentration are proportional to CHO3 concentration
• D. in respiratory alkalosis, renal H+ secretion is increased
• E. HCO3 reabsorption depends upon the rate of H+ secretion by the renal tubular cells