Which of the following is a true statement about a common-size income statement? Select one: O a. It shows the total dollars of revenue earned by a firm during a given period of time. O b. Cost of Goods Sold (COGS) and Selling General & Administrative (SG&A) are recorded in total dollars spent. c. It allows a firm to easily and accurately make year-to-year comparisons regarding profitability and expenses. O d. It shows how many pennies out of every dollar of revenue are earned at gross, operating, and net. O e. C&D both are true statements