When the operating profit reported under Full Absorption Costing is 2,000 lower than the operating profit reported under Variable Costing, which statement could be a possible explanation for that difference? O A. 400 units were produced at a full manufacturing cost of 5 per unit. OB. 400 units were sold in addition to this period's production - they were taken from existing inventory. Fixed manufacturing overheads allocated to each unit were 5 per unit. OC. 400 units of this period's production were not sold. Fixed manufacturing overheads allocated to each unit were 5 per unit