A Client Who Is Reading a Newspaper Asks, "This Article

A client who is reading a newspaper asks, "This article about health care states that many providers of health care lack effectiveness. What is the difference between effectiveness and efficiency?" The nurse explains that:

A) effective means performing the correct test or intervention whereas efficiency refers to the wise use of supplies and resources for the desired outcome.
B) effective refers to competence in clinical practice and efficiency describes quick completion of the task.
C) efficiency means wasting and meeting a minimum standard and effectiveness refers to taking all the time needed to exceed expectations.
D) efficiency refers to speed and effectiveness refers to the usefulness of the implementation.