Which of the following BEST describes the internal growth rate? A. The maximum attainable growth rate if the firm pays out no cash dividends. B. The maximum attainable growth rate if the firm maintains a constant debt/equity ratio. O C. The maximum attainable growth rate if the firm issues no new debt, and issues no new shares. D. The maximum attainable growth rate if the firm issues no new debt while using internal equity to buy back shares