Which of the following statements about net profit margin is not correct?

Multiple Choice

A company with a net profit margin of $10\%$ is using $90\%$ of each dollar of revenue to cover costs and expenses.

Based on net profit margin, Company A with Revenue of $$100,000$ and Net Income of $$40,000$ is superior to Company B who has Revenue

of $$50,000$ and Net Income of $$30,000.$

A company with a net profit margin of $10\%$ may be evaluated differently depending upon which industry it is in$.$

If a company's net profit margin increases from $15\%$ to $20\%$ this would be considered an improvement in profitability.