Which of the following statement is correct? a. From the standpoint of cost control, the weighted average method of process costing is superior to the FIFO method b. Under the FIFO method, costs per equivalent unit will contain only costs from the current period. C. Under the FIFO method, the percentage of completion of the ending inventory must be greater than the percentage of completion of the beginning inventory. The cost per equivalent unit for conversion costs will always be the same under both the FIFO and the weighted- average methods if there is no ending work in process inventory