Answer:
The correct answer is B. The use of an analog modem to transmit data over voice telephone lines.
Step-by-step explanation:
Dial-up is the oldest Internet connection method and was the only one used when the Internet took its first steps. Access is made by the user through an analog modem and a conventional telephone line. It is less and less used, since the data transmission capacity does not exceed 56 kbps, which makes navigation very slow, unstable and keeps the telephone line busy when connected to the internet. With the popularization of broadband access services and their very affordable prices, dial-up access is virtually obsolete.