Read the paragraph. Kainoa is researching an informative essay about recycling and its effect on the environment. He finds a great deal of information at wikipedia. org. The facts and details are more compelling than those he found at a government website with supporting statistics and graphs.

What concern should he have about using wikipedia. org as a source?

Though the site may contain interesting information, it could become expensive to use its information.
There is no concern, as wikipedia. org is a credible source on most topics.
There is no concern, as authors work together to evaluate and verify the information posted.
Though the site may contain interesting information, it is written by anonymous authors.