Which of the Following Statements Is Incorrect

Which of the following statements is incorrect?

A) A year-end purchase of inventory increases the LIFO cost of goods sold when prices are increasing and a periodic inventory system is used.
B) A year-end purchase of inventory increases the FIFO ending inventory when prices are increasing and a periodic inventory system is used.
C) The choice of an inventory costing method is dependent on the actual flow of goods when inventory is sold.
D) A year-end purchase of inventory doesn't affect the weighted-average ending inventory when prices are increasing and a periodic inventory system is used.