Which statement causes more undo generation?

View Exhibit.
Which statement causes more undo generation?
Exhibit:

View Exhibit.

Which statement causes more undo generation?

A.
SELECT * FROM emp;

B.
DELETE FROM emp WHERE empno=7934;

C.
UPDATE emp SET comm=400 WHERE empno=7844;

D.
INSERT INTO emp VALUES(7999,’JHON’,’CLERK’,7782,’10-MAY-83′,1500,NULL,10);



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