Which of the Following Is Not a Benefit of Packet

Which of the following is not a benefit of packet switched services?

A) The data transmission rates tend to be lower than dial-up or dedicated circuits.
B) You don't have to set up dedicated circuits between each end point from which you wish to transmit and receive data and/or voice.
C) You have the flexibility to send data through a temporary circuit between two connections that will be disconnected as soon as the digital transmission is completed.
D) All circuits are less susceptible to a great deal of noise because they are digital.
E) You don't have to specify all the interconnecting services you need for your WAN when you buy the service.