What would you include in a recommendation to the CEO for a better method for evaluating the performance of the regions? a. The method used to evaluate the performance of the regions should be reevaluated. b. A better regional performance measure would be the return on investment (operating income divided by regional assets). c. A better regional performance measure would be the residual income (operating income less a minimal return on regional assets). d. None of these choices would be included. e. All of these choices (a, b & c) would be included