Which of the pricing relationship below is correct? A call option has no value at expiration if the stock price is greater than the strike price. Put options with a lower strike price are worth at least as much as put options with a higher strike price. The net profit at expiration for a put is the strike price plus the price of the stock at expiration minus the price of the put at expiration. The net profit at expiration for a call is the higher of stock price minus the strike price or zero, minus the call price paid up front. Both a and d are correct