You open a margin account with an initial cash investment of $3,500. You buy 200 shares of stock at $35 per share. Your broker requires a 30 percent maintenance margin. The call money rate plus the spread is 5 percent. After 1 year, the share price increase to $44. What is the rate of return on your investment? O 31.43 percent 23.31 percent 25.71 percent 28.21 percent O 46.43 percent