66. In animal circulatory systems, which one is the correct description?
(A) Hemophilia results from a deficiency in platelets.
(B) The meshwork that forms the fabric of a blood clot mostly consists of fibrinogen.
(C) Reduced levels of hemoglobin in the blood result in the condition of anemia.
(D) During cellular maturation, mammalian erythrocytes lose their plasma membrane.
(E) The primary function served by erythrocytes is defense against pathogens.