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

D

Explanation:

When the major blood vessels supply the heart with blood become clogged.

either wyoming or idaho

the answer is: c. c.it limited the president’s power to start wars.

the war powers resolution of 1973 requires the president to notify the congress whenever the president wanted to order a military operation to other countries within 48 hours. if after being reviewed the congress disagree with the proposal, that the president will be banned from ordering the operation.