A pizza restaurant starts the day with a certain amount of pizza dough. The length of time the dough will last varies inversely with the number of medium pizzas made. If they need to make 32 medium pizzas, the dough will last 5 hours. How long will the dough last if they need to make 40 pizzas? A. 2.75 hours B. 6.25 hours C. 8 hours D. 4 hours