An excel workbook is a collection of A. Workbooks B. Worksheets C. Charts D. Worksheets and charts

The correct answer is: D. Worksheets and charts

An Excel workbook is a collection of worksheets and charts. A worksheet is a single page in a workbook, and a chart is a visual representation of data. Worksheets can be used to store and organize data, and charts can be used to visualize data and make it easier to understand.

Option A is incorrect because a workbook is a collection of worksheets, not other workbooks.

Option B is

incorrect because a workbook is a collection of worksheets, not charts.

Option C is incorrect because a workbook is a collection of worksheets and charts, not just charts.