People with Sickle-Cell Disease Have Deformed Hemoglobin Molecules and Often

People with sickle-cell disease have deformed hemoglobin molecules and often suffer muscle pains, even at low levels of exertion. These symptoms might occur because the deformed hemoglobin

A) is unable to carry the amount of oxygen required for normal muscle activities.
B) cannot diffuse across the cells' membranes from the blood plasma.
C) causes damage to the muscle cells as it enters the muscle.
D) decreases the ratio of surface area to volume in a person's lungs.