The correct answer is: A. Write Reservation Password
A write reservation password is a password that is used to prevent other users from making changes to a workbook. When a workbook is protected with a write reservation password, only the user who knows the password can make changes to the workbook.
A protection password is a password that is used to prevent other users from opening or viewing a workbook. When a workbook is protected with a protection password, only the user who knows the password can open or view the workbook.
Read-only recommended is a setting that is used to discourage other users from making changes to a workbook. When a workbook is set to read-only recommended, other users can still open and view the workbook, but they will not be able to make changes to it.
Therefore, the only option that allows you to save and protect the workbook is A. Write Reservation Password.