The Pregnant Patient Tells the Nurse That Her Prescribed Medication

The pregnant patient tells the nurse that her prescribed medication is not as effective as it was before her pregnancy. What is the best response by the nurse?

A) "This is because your blood volume has increased."
B) "Tell me how you have been taking your medication."
C) "This is because your baby is receiving part of the medication."
D) "Maybe the medication has expired; check the label."