Sonya is writing an essay about animal overpopulation. She is studying the causes, extent, and effects of this problem. She finds a website that was published by the Humane Society several years ago. The site has a wealth of statistics that would be really useful to cite in her essay. What should she be most cautious of when deciding whether or not to use this source?

A. whether or not it is a .org website
B. whether or not the information is outdated
C. whether or not the author is an expert
D. whether or not the site contains opinions