Which of the Following Statements About 2,3 -BPG Is FALSE

Which of the following statements about 2,3 -BPG is FALSE?

A) 2,3 -BPG increases the affinity of hemoglobin for oxygen.
B) 2,3 -BPG is produced by red blood cells.
C) 2,3 -BPG is an intermediate of glycolysis.
D) 2,3 -BPG synthesis is inhibited by high levels of oxyhemoglobin.
E) 2,3 -BPG produces a rightward shift in the hemoglobin -oxygen dissociation curve.