Which of the following does **NOT** have an answer in the text?
The Internet is a global network that connects millions of computers. People use it for various purposes such as sending e-mails, shopping online, and watching videos. Teenagers often use social media to share photos and chat with friends. However, they should be careful about sharing personal information online.
A)What can people do on the Internet?
B)Why should teenagers be careful online?
C)How many computers are connected to the Internet?
D)What do teenagers use social media for?