Assessment of Blood Glucose Levels Is Prescribed Every 6 Hours

Assessment of blood glucose levels is prescribed every 6 hours for a patient who is receiving total parenteral nutrition (TPN) . The patient asks why this is necessary. Which of the following responses by the nurse is most appropriate?

A) "When people receive TPN, they develop mild diabetes, which needs to be well regulated."
B) "TPN contains a lot of sugar. We monitor blood glucose to be sure it doesn't get too high."
C) "There is a lot of sugar in the solution, which can increase the risk for rebound hypoglycemia."
D) "We have to monitor your glucose because the physician prescribed it."