What is true regarding a transaction executed in Automatic Undo Management mode?()<img src="https://nimg.ppkao.com/2018-08/wangjing/2018080111005595434.jpg?sign=7a128cb0e2d2b5f3df6aa2d6e3d65fcb&t=62d39d0d" />
A、A
B、B
C、C
D、D