After CO₂ Is Produced by Tissues,in What Form Is Most of That

Multiple Choice

After CO₂ is produced by tissues,in what form is most of that carbon transported to the lungs for removal from the body?

A) As dissolved CO₂
B) Bound to hemoglobin
C) As H₂CO₃
D) As dissolved HCO₃⁻
E) As carbonic anhydrase