What Does NOT Explain Changing Focus in Public Relations

What does NOT explain changing focus in public relations?

A) The field of public relations has broadened far beyond the concept of media relations.
B) The growth of public relations as a career field distinctly separate from journalism has spawned.
C) The number of available public relations jobs has dwindled in recent years.
D) An expanding area of public relations practice is crisis communication counseling.
E) An increasing amount of writing is being done in "controlled" media.