Question

what is the purpose of the subtotal feature?
summarizes data for analysis
copies the headings to the clipboard
performs calculations
groups data by levels

Explanation:

The Subtotal feature in software (like Excel) is used to summarize data, often for analysis, by calculating subtotals for groups of related data. The option "copies the headings to the Clipboard" is incorrect as Subtotal doesn't handle clipboard for headings. "Performs calculations" is too vague as it's more about summarizing (not general calculations). "Groups data by levels" is not the main purpose; grouping is part of the process but the main purpose is summarizing for analysis. So the correct option is the one about summarizing data for analysis.

Answer:

A. summarizes data for analysis