Consider a pair of at-the-money European call and a put options written on the same non-dividend-paying stock with the same maturity. Which of the following statements is most accurate? (a) The minimum price of the call is at least as much as that of the put. (b) The minimum price of the call is equal to that of the put. (c) The minimum price of the call is less than that of the put. (d) There is not enough information to decide.