The answer is A: You should not use the article as a reference. The lack of corroboration and outdated information outweigh the author's credentials.
Scientific discourse is built around the notion of intersubjectivity, as Kant famously noted in his Critique of Pure Reason. This means that all research needs to be embedded in a “conversation” or dialogue with other researchers and scientific tendencies in order to validate it and to keep it actualized or current. If any research lacks this dialogue -it is not corroborated and it is outdated- it should not be trusted.