For the month of October, 2019, a division of Romage Industries had the following operating data: Sales revenue $450,000 Income $25,000 Investments $500,000 Opportunity cost of capital 6% Based on the above information, which one of the following statements is correct? The division has: Select one: a. return on investment of 5.6%. O b. return on investment of 6%. C. residual income of $30,000. d. residual income of $(5,000)