Which of the following releases a lock currently held by a user on the HOMEWORK10 table? a.

Question:

Which of the following releases a lock currently held by a user on the HOMEWORK10 table?
a. A COMMIT command is issued.
b. A DDL command is issued to end a transaction.
c. The user exits the system.
d. A ROLLBACK command is issued.
e. all of the above
f. none of the above