Final answer:
A. Time-series analysis. The correct answer is Time-series analysis. This involves studying patterns and trends in data over a specific period of time.
Step-by-step explanation:
The correct answer is A. Time-series analysis. Time-series analysis involves studying patterns and trends in data over a specific period of time. In this case, charting the closing stock prices of Walmart for the most recent three years by quarter would involve analyzing the historical data and identifying any patterns or trends that can help in understanding the stock market performance of the company.