Question: To use VBA code to maintain a different VBA project, you can make use of VBA's extensibility. What is needed to enable extensibility?

1. Set Macro Security to Trust Access to the VBA Project Object Model
2. The project's workbook should be protected in the Ribbon's Review tab
3. Include a reference to Microsoft VBA Extensibility 5.3
4. Include a reference to Microsoft VBA Extensibility 5.3 and set Macro Security to Trust Access to the VBA Project Object Model

Answer: The correct answer of the above question is Option C:Include a reference to Microsoft VBA Extensibility 5.3