对于畸形舌侧沟引起的根尖周炎，其治疗方法是（）
A.分次磨除法
B.根管治疗
C.拔除
D.直接盖髓术
E.间接盖髓术
参考答案：C
(a) Calculate the cost of the current ordering policy and the change in the costs of inventory management that will arise if the economic order quantity is used to determine the optimum order size for Product KN5. (6 marks)
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