To Preserve the Original Version of a Workbook So You

Multiple Choice

To preserve the original version of a workbook so you can make changes to a copy of it,which of the following would you do?

A) Leave the workbook closed.
B) Open the workbook,change the first worksheet,and save it using the Save command.
C) Open the workbook,make changes,and then save it using the same name.
D) Open the workbook,make changes,and then save it using a different name.