52. In the above graph, curve ______ is most likely the oxygen-binding curve for normal adult human hemoglobin. Curve______ is most likely that of llama hemoglobin (from a llama population that has lived in the mountains of Peru forthousands of years). Curve ______ is most likely that of myoglobin.
(A) A, B, C
(B) A, C, B
(C) B, C, A
(D) B, A, C
(E) C, B, A