Final answer:
The Subtotal command in programs like Microsoft Excel is indeed used to create summary reports that categorize data and perform subtotal calculations, making it a useful feature for data analysis in large datasets.
Step-by-step explanation:
The answer to the question is A) True. The Subtotal command in spreadsheet programs like Microsoft Excel creates summary reports that organize data into categories and calculates subtotals for those categories.
This feature is particularly useful when working with large datasets as it helps in collapsing data into a more manageable form and provides quick insights by performing calculations like sum, average, count, etc., for specific groups within the data.