Identify the correctly constructed ALTER TABLE statement to add a UNIQUE constraint to the column driver$\_$license with the constraint name driver$\_$license$\_$unique on the table called 'identification'.

ALTER TABLE identification ADD UNIQUE driver$\_$license CONSTRAINT $($driver$\_$license$\_$unique$)$;

ALTER TABLE identification ADD CONSTRAINT driver$\_$license UNIQUE $($driver$\_$license$)$;

ALTER TABLE identification ADD CONSTRAINT driver$\_$license UNIQUE $($driver$\_$license$\_$unique$)$;

ALTER TABLE identification ADD CONSTRAINT driver$\_$license$\_$unique UNIQUE $($driver$\_$license$)$;