You type the keywords "formation of coal" into a search engine and pull up
the following website:
Coal Wiki - How Does Coal Form?
Coal takes millions of years to form. First, dead plants and animals are buried
by sediment. Over time, pressure...
www.coal-wiki.org
Do you think this is a good source of scientific information about the
formation of coal?
A. No; this website can be revised by any visitor to the site and may
be inaccurate.
B. No; this website is designed to sell a product or service and is
likely to be biased.
C. Yes; this website is written to educate the general public about a
scientific topic.
D. Yes; this website is written by experts, and the content is peer
reviewed.