Refer to the Graph Showing Several Different O₂-Binding/dissociation Curves for Hemoglobin

Refer to the graph showing several different O₂-binding/dissociation curves for hemoglobin. Curve _______ would most likely represent a normal adult human, curve _______ would most likely represent an adult human exposed to high altitude, and curve _______ would most likely represent a human fetus.

A) A; B; C
B) A; C; B
C) B; A; C
D) B; C; A
E) C; B; A