A Research Study Is Being Conducted to Analyze the Effect

A research study is being conducted to analyze the effect of nutritional supplementation and type of selected support surface on rate of wound healing in sacral myocutaneous flap failures.Which of the following variables is an independent variable in this study? (Select all that apply.)

A) Rate of wound healing
B) Sacral myocutaneous flap
C) Retailer of protein supplement
D) Nutritional supplementation
E) Type of support surface

Correct Answer:

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