Which of the following is the most credible source for an essay on the benefits and drawbacks of genetically modified foods (GMOs)?


An advertisement by an activist organization with a mission of stopping the use of GMOs.


An article in a popular magazine featuring recipes for only non-GMO ingredients.


A university study published in an academic journal including research statistics on the effects of GMOs.


A blog post from a writer who has aggregated a variety of anecdotal evidence against GMOs.