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Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
Atherosclerosis impedes coronary blood flow by which of the following mechanisms?
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The correct answer is  Option A: Arteries, not veins, supply the coronary arteries with oxygen and other nutrients.
Option C: Atherosclerosis is a direct result of plaque formation in the artery.
Option D: Hardened vessels can’t dilate properly and, therefore, constrict blood flow.