An Excel Workbook is a collection of ________

Answer: Option D

Think of an Excel Workbook like a notebook.

Option A: Workbooks - A Workbook can't be a collection of itself! That doesn't make sense.

Option B: Worksheets - Worksheets are like individual pages in your notebook. You can have many of them.

Option C: Charts - Charts are visual representations of your data, like graphs. They are part of what you can put in your workbook.

Option D: Worksheets and Charts - This is the best answer. A Workbook contains both the data tables (worksheets) *and* the visual representations (charts) that help you understand that data. It's like your notebook having both tables of information *and* graphs to make it easier to see the trends.