Which of the following statements is false? Select one: a. Operating expenses can be easily analyzed by preparing a common-size income statement. b. Impairment charges do not need to be analyzed since they are generally a non-recurring expense c. It is important to analyze operating expenses over which management exercises discretion and that have considerable impact on the firm’s profitability d. Operating expenses should be tracked in terms of trends, absolute amounts, relationship to sales, and relationship to industry competitors