The table below contains the implied volatility and option price for a series of call options of varying strike prices and varying time to expiration. The current stock price is $74.90. Suppose I want to buy the at-the-money option which is relatively cheapest. Which option should I buy? Implied Volatility December January April (T=0.17) (T-0.25) (T-0.50) 0.300 0.280 0.320 0.284 0.275 0.257 0.269 X 70 75 80 December, X-75 January, X-75 January, X-70 O December, X=80 O April, X-75 0.290 0.285. Actual option price December January (T-0,17) (T-0.25) 4.35 5.89 2.46 3.02 0.77 1.13. April (T-0.50) 6.95 4.40 2.20