Within the application MY_APP the following PREVIOUS VALUE expression references the sequence MY_SEQ: PREVIOUS VALUE FOR my_seq After which of the following events will the most recently generated value of MY_SEQ persist so that it can be returned to the active MY_APP application?（）
- AAfter a ROLLBACK is issued
- BAfter the sequence is altered
- CAfter the sequence is dropped
- DAfter the current session end