Best Practices for Using Subsidiary Views - L2MB Conclusion Exam

I am struggling with best practices related to subsidiary views. According to the lesson and the case study within, subsidiary views can be used to:

• show an attribute for end user analysis, filtering, or sorting
• show an alternative hierarchy for a dimension
• display numeric values, such as ratios, that are needed for calculation
• filter reports or provide attribute for exports (e.g. for transactional data)

I answered the exam question according to the above lesson:

• Use for report filtering or providing attributes for exports
• Use to add an attribute to facilitate end user sorting
• Use an output module for analysis for filtering

However I'm still getting incorrect response. Am i missing anything? Pls help.

PS: the other 2 options are:

• Use to improve calculation performance by removing a list
• Use for synchronization of some user elements.