我国2M复用成AUG的骤是（）。<br>A:C-12->VC-12->TU-12->TUG-2->VC-3->AU-4->AUG<br>B:C-12->VC-12->TU-12->VC2->TUG-2->TUG-3->AU-4->AUG<br>C:C-12->VC-12->TU-12->TUG-2->TUG-3->VC-4->AU-4->AUG<br>D:C-12->VC-12-->TU-12->TUG-2->VC-3->TUG-3->AU-4->AUG

我国2M复用成AUG的骤是（）。
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

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