When importing a table into a database，the import process performs these tasks： 
1. Triggers are imported. 
2. Data is imported. 
3. New tables are created. 
4. Indexes are built. 
5. Any bitmap， functional， and/or domain indexes are built. 
6. Integrity constraints are enabled on the new tables. 
Which option shows the tasks in the order in which they are performed？（）