阅读“Reading 2”中的材料，选出最佳选项。
1．What does the writer tell us in Paragraph 1?
A．Definition of online safety.
B．The writer's bad experiences.
C．Guidelines on online safety.
D．The topic of the post.
2．What is the golden rule of the Internet?
A．Leave uncomfortable site at once.
B．Protect your personal information.
C．Be polite to others.
D．Post comments on anything.
