Consider a hypothetical hemoglobin with a Hill coefficient of 1 and the same p50 value as normal hemoglobin. Choose the statement below that best describes the two proteins.

a. The two hemoglobins would be able to deliver about the same amount of oxygen to the tissues.

b. At pO2 less than p50, normal hemoglobin has a greater YO2 value.

c. There is a cooperative interaction between oxygen-binding sites in both the hypothetical and normal hemoglobins.

d. The hypothetical hemoglobin has a greater oxygen affinity than normal hemoglobin.

e. The oxygen binding curve for the hypothetical hemoglobin is hyperbolic, and the curve for normal hemoglobin is sigmoidal.