The reorder point for an item is calculated to be 250 units. Lead time for the item is 2 weeks. If 25 units of the item have just been sold to a customer, which of the following inventory situations should trigger an order?

a. 240 units on hand, with no orders scheduled for delivery from the supplier.
b. 200 units on hand, with an order for 150 units scheduled for delivery next week from the supplier.
c. 90 units on hand, with an order for 150 units scheduled for delivery next week from the supplier.
d. All of the above situations (a,b,c) should trigger an order.
e. Both (a) and (c) should trigger an order.