After the Home Health Nurse Has Taught a Patient and Family

After the home health nurse has taught a patient and family about how to use glargine and regular insulin safely, which action by the patient indicates that the teaching has been successful?

A) The patient administers the glargine 30 to 45 minutes before eating each meal.
B) The patient's family fills the syringes weekly and stores them in the refrigerator.
C) The patient draws up the regular insulin and then the glargine in the same syringe.
D) The patient disposes of the open vials of glargine and regular insulin after 4 weeks.