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Social Studies, 13.12.2020 02:20 hailiemanuel930

1. What is the main cause of a heart attack? A. Blood flow is blocked by a blood clot B. Heart beats irregularly C. The valves in the heart don’t operate properly D. A blood clot is blocking a vessel to the brain

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1. What is the main cause of a heart attack? A. Blood flow is blocked by a blood clot B. Heart beats...
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