An investor puts up $12,000 but borrows an equal amount of money from his broker to double the amount invested to $24,000. The broker charges 5% on the loan. The stock was originally purchased at $40 per share, and in 1 year the investor sells the stock for $44. The investor's rate of return was Mutiple Choice O 750% 12.50% 05.00 O 15.00%