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?（）
A.After a ROLLBACK is issued
B.After the sequence is altered
C.After the sequence is dropped
D.After the current session ends
参考答案：A
