Which of the Following Statements Is TRUE

Which of the following statements is TRUE?

A) The reorder point is the point at which the amount of inventory on hand equals the amount needed to cover sales during the lead time.
B) The reorder point is the minimum level of inventory allowed during a particular period.
C) The safety stock is the amount of stock that must be on hand to cover sales during lead time.
D) The safety stock is the minimum level of inventory that must remain on hand at all times.
E) The safety stock is the minimum level of inventory that must remain at the customers.