An at- the- money call option with a strike of 50, 24 days left to expiration and a risk free rate of 0.25% is trading at $1.03. Using the Black-Scholes formula, what will be the price of this option one day later, assuming that all other inputs remain the same?
a) 0.99 b) 1.01 c) 1.03 d) 1.05