The correct answer is: A. Extends a sequential series of data.
The autofill feature in Google Sheets allows you to extend a sequential series of data by simply dragging the fill handle down or across the cells. For example, if you have a series of numbers in cells A1:A5, you can drag the fill handle down to cell A10 to automatically fill in the remaining cells with the next numbers in the series.
The autofill feature can also be used to extend other types of data, such as dates, times, and text. For example, if you have a series of dates in cells B1:B5, you can drag the fill handle down to cell B10 to automatically fill in the remaining cells with the next dates in the series.
The autofill feature is a powerful tool that can save you time and effort when working with data in Google Sheets.
Option B is incorrect because the autofill feature does not automatically add range of cell values. You can manually add range of cell values by selecting the cells you want to add and then pressing the Ctrl+Shift+Enter keys.
Option C is incorrect because the autofill feature does not apply a border around the selected cells. You can manually apply a border around the selected cells by selecting the cells you want to apply a border to and then clicking the “Format” menu and selecting “Border”.