Read this sentence from paragraph 3.

This means that knowledgeable experts can post information about a variety of subjects—and so can people who are not knowledgeable experts.
What does the author try to explain in this sentence?

A
It is hard to determine who is an expert on the internet.
B
The internet contains too much information in general.
C
There are not many experts on the internet.
D
The internet includes false information.