About command ‘# mv abc xyz’, which statement is wrong:
A.
If abc is a normal file and xyz doesn't exist before, then this command will change the file name abc to xyz.
B.
If abc is a normal file and xyz is a directory, this command will move file abc into directory xyz.
C.
If abc is a directory and xyz is also a directory, this command will make abc to be the subdirectory of xyz.
D.
If abc is a directory and xyz is a normal file, this command will overwrite xyz, i.e. xyz will lost.