Surprised that there is no discussion on this one.
I think it is clear that what is needed for the conclusion to follow logically is that Stevens must be a certified psychoanalyst.
Where I have a problem is that none of the answers available give that he is a "certified psychoanalyst." (A) comes closest but does not tell us that he is certified. Isn't it possible that he is a psychoanalyst but not certified? I think it is debatable.
However (B) gives that The Journal frequently accepts Stevens' articles. Now, if The Journal did frequently accept Stevens' articles for publication then the conclusion would follow logically, for under this situation it is given that Stevens is a certified psychoanalyst, else the articles submitted could not be published.
Granted, (B) does in fact leave out the words "for publication" but in context I thought it could be taken to mean "accepted [for publication]."
Any thoughts would be greatly appreciated -- thank you.