Which two statements correctly distinguish between undo and redo data?
A.
Undo reverses a change, whereas redo re-creates a change.
B.
Redo reverses a change, whereas undo re-creates a change.
C.
Undo protects against inconsistent reads, whereas redo protects against data loss.
D.
Redo protects against inconsistent reads, whereas undo protects against data loss.