C is corrent. Return on sales is equal to net operating profit divided by sales. Thus, it is equal to 6% ($3,000,000 ÷ 50,000,000).
A is incorrect because return on sales is calculated by dividing net operating profit by sales.
A is incorrect because return on sales is calculated by dividing net operating profit by sales.
D is incorrect because return on sales is calculated by dividing net operating profit by sales.
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