Which of the following statements is false? (Explain your answer please)

A. Common-size financial statements present items as a percentage of some "base number" on the financial statement in question.

B. It is possible that when cost of goods sold in dollars increases, cost of goods sold as a percentage of sales decreases.

C. Time-series analysis helps identify financial trends over time for a single company or business unit.

D. In a common-size balance sheet, all items are expressed as a percentage of total sales.