Answer:
xlsm
Step-by-step explanation:
Generally, workbooks are known as Microsoft Excel files. Excel workbook can be defined as a collection of one or more charts and worksheets (spreadsheets) used for data entry and storage in an excel file. In order to create a project on Excel you will have to use a workbook.
A spreadsheet can be defined as a file or document which comprises of cells in a tabulated format (rows and columns) typically used for formatting, arranging, analyzing, storing, calculating and sorting data on computer software applications such as Microsoft Excel.
The Microsoft developers has made it easy for their users to automate the tasks used frequently through the creation and execution of macros.
Basically, macros comprises of commands and instructions which may be grouped together as a single command to automatically execute a task.
In this scenario, Victor has an Excel workbook that contains a macro. Thus, the appropriate file type to save the workbook in is the xlsm extension (format).