Suppose you buy a round lot of Altman Industries stock on 50% margin when it is selling at $35 a share. The broker charges a 10 percent annual interest rate and commissions are 5 percent of the total stock value on both the purchase and the sale. If at year end you receive a $1.00 per share dividend and sell the stock for $42.63, what is your rate of return on the investment? A. 15.58% B. 11.84% C. 14.74% D. 21.84% E. 28.38%