Auto Sum
The correct answer is option 'C' - Auto Sum. In EXCEL, you can sum a large range of data by simply selecting a tool button called Auto Sum.

What is Auto Sum?

Auto Sum is a built-in function in Microsoft Excel that allows you to quickly calculate the sum of a range of numbers. It automatically selects the range of cells that it believes you want to sum and provides the sum of those numbers in the selected cell.

How to use Auto Sum?

To use Auto Sum in Excel, follow these steps:

1. Select the cell where you want the sum to appear.
2. Go to the Home tab in the Excel ribbon.
3. Locate the "Auto Sum" button in the "Editing" group. It is represented by the Greek letter sigma (∑).
4. Click on the Auto Sum button. Excel will automatically select what it thinks is the range of cells you want to sum.
5. Press Enter on your keyboard, or click outside the selected range to confirm the sum. The sum will be calculated and displayed in the selected cell.

Benefits of Auto Sum

Using Auto Sum in Excel has several benefits:

1. Time-saving: Auto Sum allows you to quickly calculate the sum of a range of numbers without the need for manual calculations.
2. Accuracy: Auto Sum eliminates the risk of human error in calculating sums manually.
3. Flexibility: Auto Sum adapts to the range of cells you select, making it easy to sum large sets of data without the need for complex formulas.
4. Dynamic updates: If you add or remove numbers from the range, Auto Sum will automatically update the sum to reflect the changes.

Conclusion

Auto Sum is a handy tool in Excel that simplifies the process of summing large sets of data. By selecting the Auto Sum button, Excel automatically selects the range of cells it believes you want to sum and calculates the sum for you. This feature saves time, improves accuracy, and provides flexibility in handling numerical data in Excel.