The USD GBP (Pound Sterling) exchange rate is 1.38. The USD interest rate is 2% per annum, and the GBP interest rate is 1% per annum. According to the Black-Scholes-Merton model, what is the price of a European call option on the exchange rate with a strike price of 1.50 and maturing after 18 months. The volatility of the exchange rate is 20%. The contract multiplier is 100. O a. $11.67 Ob $10.96 O c. $9.90 O d. $9.43 O e. $12.28