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Which of the following statements concerning margin trading is (are) correct? I. The purchase of stock with cash in the hope of earning a capital gain is known as taking a long margined position in the stock. II. Margin trading magnifies losses on a percentage basis. III. Margin trading requires the borrowing of securities. IV. If Fred buys 1,000 worth of stock using 60% margin, he will need to pay 400 in cash to make the purchase. O A. II only OB. II, III and IV only OC. I and II only OD. I, III and IV only