Which of the following statements is true of process costing? O A In the period of rising prices, weighted-average process-costing method will result in higher operating income as compared to FIFO process-costing method OB. In the period of rising prices, weighted average process costing method will result in lower cost of goods sold as compared to FIFO process costing method OC. In a period of falling prices, weighted average process-costing method will result in a higher income tax liability as compared to FIFO process-costing method OD. The operating income and the income tax liability of a company are not affected by the method of process costing being followed by the company