The question posed by the author in the highlighted sentence of the passage introduces which one of the following? A. the author's belief that it is futile to resist the trend toward defining the physician's work as a trade B. the author's dislike of governmental regulation and consumer advocacy C. the author's inquiry into the nature of the practice of medicine D. the author's suggestions for rallying sensible people to a concentrated defense of physicians E. the author's fascination with the origins of words