Jumana has all her work saved in a workbook and maintains a backup of the data. She opens a new workbook to create a copy of the data. Which two keys should she press to copy the data from the original workbook to the second workbook?

To copy data from one workbook to another, Jumana should follow these steps:

1. Open the Original Workbook:
- First, she needs to open the workbook where her data is currently saved.

2. Select the Data to Copy:
- She should select the range of cells that she wants to copy. This can be done by clicking and dragging the mouse over the cells or using the keyboard arrows while holding the 'Shift' key.

3. Copy the Data:
- Once the data is selected, she should press the key combination Ctrl + C. This command copies the selected data, placing it onto the clipboard, ready to be pasted elsewhere.

4. Open the New Workbook:
- Next, Jumana should open the new workbook where she wants to paste the copied data.

5. Paste the Data:
- In the new workbook, she needs to click on the cell where she wants the copied data to begin. Then, she should press the key combination Ctrl + V. This command pastes the data from the clipboard into the new location.

By following these steps, Jumana can successfully transfer the data from the original workbook to the second workbook using the key combinations Ctrl + C for copying and Ctrl + V for pasting.