A Bone Marrow Sample from Patient X Has Abnormally-Low Numbers

A bone marrow sample from Patient X has abnormally-low numbers of megakaryocytes.What body process would you expect to be impaired in Patient X?

A) transport of oxygen
B) defense against foreign microorganisms
C) blood clotting following injury to a blood vessel
D) temperature regulation by vasoconstriction or vasodilation of superficial blood vessels
E) maintaining normal osmotic balance between the blood and the interstitial fluids