The most striking characteristic of the virtual path concept(VP) used in ATM networks, compared to..

The most striking characteristic of the virtual path concept(VP) used in ATM networks, compared to the digital paths in STM networks is
A. the bandwidth hierarchy available in virtual paths.B. the abolishment of all digital cross-connect systems(DCS).C. the independence of route and bandwidth establishment.D. the decrease in the number of failed paths to be restored due to a failure.