C, 60% is the correct answer.
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It is a barrier to listening because if you're thinking of something else, than you're not paying attention to the person whose talking.
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Answer:
Korotkoff sounds are blood flow sounds that healthcare providers observe while taking blood pressure with a sphygmomanometer over the brachial artery in the antecubital fossa. These sounds appear and disappear as the blood pressure cuff is inflated and deflated.
Explanation:
He lost a lot of blood and they are dripping fluid faster to help replace the bloo lost.