Your broker's initial margin requirement is 70%, and the maintenance margin requirement is 30%. What is your rate of return, if you short sell 300 shares of stock at $27.44 per share and cover your short position nine months later at $30.21 per share,? OA) - 11.21% B) - 10.02% OC) - 14.42% OD)- 13.55% OE) - 12.31%