Final answer:
To create a group that includes only columns B:G in an Excel worksheet, you would select the columns, go to the Data tab, and use the 'Group Columns' option.
Step-by-step explanation:
The task of creating a group that includes only columns B:G in a Rental Revenue worksheet requires using the grouping features in Excel. The correct approach is to select the columns B:G, and upon right-clicking, the Group option will not typically show up. Instead, you should use the "Group Columns" option in the Data tab. This can be found by first highlighting the desired columns and then going to the Data tab where you will find the Group command. Once you click on "Group", it automatically creates the group for the selected columns. It is important to note that grouping is a way to organize data in Excel that can be collapsed or expanded for better data view management.