The Graph to the Right, Where YO2 Represents %O2 Saturation

The graph to the right, where YO2 represents %O2 saturation, will be used for the following questions
-The plot above describes the Bohr effect. If a third plot were added, a sigmoidal one between plots A and B,

A) this third plot would suggest an increased affinity of oxygen for hemoglobin
B) it would represent adult hemoglobin, and plot B would represent fetal hemoglobin
C) it would likely be seen if hemoglobin were in a more acidic environment
D) it would represent fetal myoglobin, and plot A would represent adult myoglobin
E) it would represent fetal hemoglobin retained in the T state