Which two statements are true regarding table compression? (Choose two.)
A.
It requires uncompress operation during I/O.
B.
It incurs extra CPU overhead during DML as well as direct loading operations.
C.
It incurs extra CPU overhead during DML but not direct loading operations.
D.
It saves disk space and reduces memory usage.
E.
It saves disk space but has no effect on memory usage.
Explanation: