Which of the following statements is true with respect to the standard of care that is applied to professionals?
a. More than usual is expected of experienced professionals and less than usual is expected of beginners.
b. A professional may be held liable despite acting in compliance with an approved practice.
c. An error of judgment always constitutes a breach of the standard of care.
d. A judge will assess a professional's conduct in comparison to the "best practices" that exist within a profession at the time of trial.
e. Because there is no separate tort of breach of a statutory duty, a court cannot consider the effect of a statute when it formulates the standard of care.