Which of the following are points of electronic power telecommunication?

Which of the following are points of electronic power telecommunication?
A . public network GPRS with low rate and long delay unable to provision telecontrol, tele indication and telemetering, slow fault locating
B. high cost for monitoring service carried by operator 4G network
C. low security and reliability of electric power services carried on public network
D. incapable of collecting electric consumption information, costly manual meter reading.

Answer: A,C,D