Movement into and out of cells — practice question

What mechanism explains how most carbon dioxide is carried in the blood?

• ACarbon dioxide dissolves in plasma and is carried in solution.
• BCarbon dioxide is converted to carbaminohaemoglobin inside red blood cells.
• CCarbon dioxide is converted to carboxyhaemoglobin inside red blood cells.
• DCarbon dioxide is converted to hydrogencarbonate ions inside red blood cells.