A 6 month European put option has a strike price of $60. The options underlying stock pays no dividends and currently trades at $65. The risk-free interest rate is 5% p.a. continuously compounded. If the volatility of the stocks return is 30.5% p.a., the price of the put option is closet to ______ according to the Black-Scholes-Merton model.

a. $2.4387

b. $9.3423

c. $9.1579

d. $2.6765