我国2M复用成AUG的步骤是( )
A:C-12-->VC-12-->TU-12-->TUG-2-->VC-3-->AU-4-->AUG
B:C-12-->VC-12-->TU-12-->VC2-->TUG-2-->TUG-3-->AU-4-->AUG
C:C-12-->VC-12-->TU-12-->TUG-2-->TUG-3-->VC-4-->AU-4-->AUG
D:C-12-->VC-12-->TU-12-->TUG-2-->VC-3-->TUG-3-->AU-4-->AUG
出自:代维资格证