In a common-size analysis of the income statement, the evolution over three years of which of the following elements is the most relevant for a forecast of the future income of a firm (a) Net income...

In a common-size analysis of the income statement, the evolution over three years of which of the following elements is the most relevant for a forecast of the future income of a firm (a) Net income before taxes as a percentage of net sales (b) Interest expense as a percentage of total interest bearing liabilities (c) Exceptional income as a percentage of net income after taxes (d) Personnel remuneration cost as a percentage of net sales revenue