View the Exhibit and examine the recommendation graph provided for a test database by the Undo Advisor.The graph recommends that the size of undo tablespace should be set to().<br /> <img src="https://nimg.ppkao.com/2018-08/tianmin/2018080110415468606.jpg?sign=8a16da1ccdfbc6df5e82758651fde537&t=62d1db4a" />
A、1 MB
B、6 MB
C、10 MB
D、15 MB
E、11 MB