Evaluating Fair Value of a European Call Option

A financial analyst is evaluating a European call option that has a current price of $100, a strike price of $90, and expires in 6 months. The risk-free interest rate is 5% per annum, compounded continuously. The analyst uses the Black-Scholes option pricing model to determine the fair value of the call option.

Using the Black-Scholes formula, which captures the relationship between the underlying asset price, strike price, risk-free rate, time to expiration, and volatility, what would be the correct conclusion about the fair value of the call option if the volatility is assumed to be 20%?