The question was 'What are included columns in SQL Server 2008'. I don't see that the status of included columns in SQL Server 2005 is relevant to the question.
If the question just said 'What are included columns in SQL Server' then options 2 and 3 are correct, but IMHO only 3 is right for the question as asked.
Original author: https://github.com/SQL-FineBuild/Common/wiki/ 1-click install and best practice configuration of SQL Server 2019, 2017 2016, 2014, 2012, 2008 R2, 2008 and 2005.
When I give food to the poor they call me a saint. When I ask why they are poor they call me a communist - Archbishop Hélder Câmara