10. Which of the following is correct? (5 points) a, Under residual dividend model, the lower the firm's debt ratio, the higher its payout ratio will be, other things held constant b. Under residual dividend model, the better the firm's investment opportunities, the higher its payout ratio will be, other things held constant. c. Stock split increases the number of shares outstanding, but decreases the firm value d. Under residual dividend model as market interest rates rise, the firm's payout ratio would increase