A nurse paged the attending physician because a postmastectomy patient became somewhat agitated and ...

A nurse paged the attending physician because a postmastectomy patient became somewhat agitated and tachypneic in recent hours.
 
  Despite other nurses' assertions that the patient was simply experiencing some anxiety, the nurse suspected a more serious etiology. The physician prescribed a single dose of a benzodiazepine, which was largely ineffective. Due to the nurse's persistence, diagnostics were performed, leading to a diagnosis of pulmonary embolism. Which of the following did the nurse exhibit?
  A) Evidence-based practice
  B) Clinical grasp
  C) Patient-centered care
  D) Best practice