You find a blog post written by a student on a university website about photosynthesis, which of the following assess the reliability of the source.

It may be reliable because the blog has been featured on a popular website.
It may be reliable, because other students verify the information in the blog.
it may be reliable because they cited other students blogs.
It may be reliable because they say multiple peer reviewed studies from scientific journals

The option that assesses the reliability of the source is: It may be reliable because they say multiple peer-reviewed studies from scientific journals.