A distinct feature of the FIFO process-costing method is that the 0 A. FFO process costng method is only mnmally diferent from the weighted-average procesuosting method O B. work done an beginning inventory before the current period is kept separafe from the work done during the current period in the calculation of equivalent units O C. work done on beginning inventory before the current period s blended with the work done during the current pericd in the calculation of equivaient units O D. work done on ending inventory is kept separate from the work done duning the current period in the cakulation of equivalent units and is usually not included in the calculation