Which Statement Concerning Fast-Packet Multiplexing Is Not True

Multiple Choice

Which statement concerning fast-packet multiplexing is not true?

A) it is a method used to transmit information
B) it is much more efficient than TDM or FDM
C) it operates on the premise that circuits may be oversubscribed in the same way that stadium seats are oversold, with the understanding that not every subscriber user will be on line at the same time
D) none of the above (all are true)