Which of the following completes the dialogue?
Selin: Hello, is this the customer service?
Agent: Yes, madam. How can I help you?
Selin: I have a problem with my internet connection. It is very slow.
Agent: I see. _________________________
Selin: Yes, I did. It didn't work.
A)Did you turn off the modem and turn it on again?
B)Do you have a computer?
C)How much do you pay for the internet?
D)Is your phone charged?