Final answer:
The correct way to insert a comment in the FormatPieChart macro is to add it before the chart style code, using ' to denote a comment in VBA.
Step-by-step explanation:
To add the comment correctly in the FormatPieChart macro, you should locate the line of code where you want the comment to appear. According to the instructions provided, the comment 'Change chart style. Press Enter when you are done.' should be placed before the actual code that changes the chart style. Here is how you would do it with VBA code in Excel:
' Change chart style. Press Enter when you are done.
ActiveSheet.ChartObjects("Chart 1").Activate
' ...existing chart style code goes here...
In this case, the correct answer would be (a) The comment should be added before the chart style code. Comments in VBA (or many other programming languages) are not executable and are used for clarification or instructions for individuals reading the code.