<prompt> Which of the following has the greatest effect on the ability of blood to transport oxygen?Capacity of the blood to dissolve oxygenAmount of hemoglobin in the bloodpH of plasmaCO2 content of red blood cells  <response>: The amount of O2 in the blood is determined by the amount of dissolved O2, the amount of hemoglobin in the blood, and the affinity of the hemoglobin for O2. 