Which of the Following Statements About Return on Investment (ROI)

Which of the following statements about return on investment (ROI) is false?

A) ROI equals margin divided by investment turnover.
B) ROI is used to measure the performance of investment centers.
C) Seeking to maximize ROI can result in a conflict between the interest of a particular manager and the interest of the business as a whole.
D) Most companies use operating assets and operating income to compute ROI.