Read the paragraph.

For an informational essay, Melanie is researching brain injuries caused by participation in contact sports. She found an article with statistics on injuries and steps for prevention at the website www.footballforall.org. This site is hosted by a nonprofit group that promotes the teaching of football to children ages five to twelve. She wants to cite the article in her essay.

What should Melanie consider most before incorporating information from this general website into her essay?

whether the author is an expert in the field of head injuries and contact sports
how long the website has been active and how many visitors it has had
how to cite information from a website within her essay
whether the group has any affiliation with a professional football league