Finding out if an exercise is safe needs to determine the fitness level of the exercise and how much it takes to achieve the result of the exercise. The person performing the exercise needs to know their endurance level and if they are able to perform the exercise without injury or illness.
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Your question: What 19th century major development came about as a result of physicians’ understanding that microorganisms caused disease?
Your answer: Infection control was the 19th century development that came about as a result of physicians' understanding that microorganisms caused diseases.
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D) Mammograms would be the correct answer
