Answer:
Click the Cascade option button
Explanation:
Based on the description of what Ryder is attempting to accomplish, the next step that he needs to do would be to Click the Cascade option button. This option will cause all the windows of the currently running applications to overlap one another but at the same time show their title bars completely visible in order to let the user know their open status. Which is exactly what Ryder is attempting to make as his desired layout for the workbooks. Therefore this is the option he needs.