Which of the Following Is Not a Problem with Dialed

Multiple Choice

Which of the following is not a problem with dialed circuits?

A) Data transmission rates on dialed circuits are relatively low.
B) Dialed circuits may vary in quality.
C) Transmission rates for dialed circuits can vary with each call.
D) It is hard to predict if a given connection will be clear or noisy.
E) Use of these circuits is very simple.