Provide your evaluation based on the common-size income statements: (Select all the choices that apply.) A. Operating expenses have decreased as a percentage of sales; this appears favorable unless this decline has contributed toward the fall in sales. B. The level of interest as a percentage of sales has increased significantly; this suggests that the firm has too much debt. C. Sales have declined and cost of goods sold has increased as a percentage of sales, probably due to a loss of productive efficiency. D. Selling expense has increased due to the increase in cost of goods sold. E. Further analysis should be directed at the increased cost of goods sold and the high debt level.