Which Is a Proposed Benefit of Hemoglobin's Ability to Bind

Which is a proposed benefit of hemoglobin's ability to bind and transport nitric oxide?

A) It allows hemoglobin to resist the effects of small pH changes as a buffer molecule.
B) By circulating into peripheral vessels,it will trigger vasodilation to improve local blood flow.
C) As it circulates it promotes smooth muscle of arteries and arterioles to contract,to increase blood pressure as needed.
D) It acts as an enzyme cofactor necessary to maintaining a "clean and smooth" endothelial lining within blood vessels.
E) It provides a carrier upon which additional electrolytes can be transported to deficient tissues in the body.