Atherosclerosis impedes coronary blood flow by which of the following mechanisms?

Plaques obstruct the vein Plaques obstruct the arteryBlood clots form outside the vessel wallHardened vessels dilate to allow the blood to flow through

Explanation.

Arteries, not veins, supply the coronary arteries with oxygen and other nutrients. Atherosclerosis is a direct result of plaque formation in the artery. Hardened vessels can’t dilate properly and, therefore, constrict blood flow.