The anwer is C. It makes more sence and is more mature.
Answer:
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"With its systematic approach, the scientific method has proven useful in shaping sociological studies. The scientific method provides a systematic, organized series of steps<span> that help ensure objectivity and consistency in exploring a social problem. They provide the means for accuracy, reliability, and validity."
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https://courses.lumenlearning.com/alamo-sociology/chapter/the-scientific-method/
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According to the United States Department of health and human services, in order to obtain sufficient physical activity for health, the Americans should perform the following activities:
1. 75 minutes per week of vigorous-intensity activity.
2. 150 minutes per week of moderate intensity activity.
3. Or, an equal combination of both moderate and vigorous-intensity activity
