Gene is writing a research paper about child nutrition around the world. He
has located a source he wants to use: a blog written last year by a college
student as part of a class project on child nutrition. Why might this source not
be credible?

A. Its author is not an authority on the subject.
B. It is likely to be biased.
C. Its information is likely to be out of date.
D. Its findings aren't relevant to his topic.