How does the chloride bicarbonate antiporter enhance the blood's capacity to transport CO2?

• A. By facilitating the exchange of bicarbonate and chloride ions, increasing CO2 transport efficiency.
• B. By directly binding CO2 and transporting it to the lungs.
• C. By increasing the concentration of CO2 in the blood.
• D. By converting CO2 into oxygen for transport.

Answer: (A)