What is the independent variable in this experiment A how likely the subjects are to get cavities B how often the subjects brush

Question

What is the independent variable in this experiment A how likely the subjects are to get cavities B how often the subjects brush and floss C how much sleep the subjects get D how much water the subjects drink Experimental Design Dental Experiment Consider the following experiment Use it to help answer the question A dentist wants to know if her patients dental habits affect how likely they are to get cavities She conducts the following experiment using two subject groups Group 1 brush their teeth and floss twice per day Group 2 continue their usual poor dental habits only occasionally brushing and flossing

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