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？（）
- A2，3，4，1，6，5
- B3，2，4，1，6，5
- C3，2，6，4，1，5
- D4，2，3，1，5，6