Follow through with (in Ex. B) uses the wrong preposition (with).
In the article: "Afterwards, follow through with a brief thank-you note" means "complete or put the finishing touch on your interview by sending a brief thank-you note." In B.9, "Follow through with suggestions people give you for finding a job" means that the one who is looking for a job should complete something by making suggestions that people give you, which doesn't make sense. The intended meaning here is "act upon suggestions," because the one who is looking for the job would follow the suggestions that people give.. To express the intended meaning, we should use the lexical follow through on: "Follow through on suggestions people give you for finding a job."