De Trader opens a brokerage account, and purchases 390 shares of Internet Dreams at $56 per share. She borrows $4,050 from her broker to help pay for the purchase. The interest rate on the loan is 5%. What is the (highest) stock price that will trigger a margin call? A. $32.79 B. $21.84 C. $16.52 D. $6.81 E. $26.32 IBM (IBM) Underlying stock price: 90.90 Put FIGURE 15.1 Options on IBM March 2, 2007 Sun The Juara Online Mach3.2007 Expiration Strike Mar 2007 85 Apr 2007 85 Jul 2007 85 Oct 2007 85 Mar 2007 90 Apr 2007 90 Jul 2007 90 Oct 2007 90 Mar 2007 95 Apr 2007 95 Jul 2007 95 Oct 2007 95 Call Last Volume Open Interest 7.50 172 1437 8.10 235 7167 9.40 27 1051 11.20 1 21 2.20 3875 3088 3.78 3779 7016 5.50 108 1625 7.70 114 159 0.35 1605 28920 1.35 691 10348 3.00 234 2805 4.70 61 421 Last Volume Open Interest 0.20 431 1487 0.70 455 10367 1.55 165 9914 2.10 2 405 1.05 8315 4649 2.10 5499 11885 3.20 1067 2795 1003 4.00 2365 27969 4.90 3502 16796 5.20 3334 2780 5.90 1 788 Refer to Figure 15.1 above, assuming that the stock price on the maturity date is $90. What is the payoff of each October long put option with strike price $85? A. $5.00 B. -$5.00 C. $2.10 D. $0.00 E. -$2.10