Which Patient Action Indicates Good Understanding of the Nurse's Teaching

Which patient action indicates good understanding of the nurse's teaching about administration of aspart (NovoLog) insulin?

A) The patient avoids injecting the insulin into the upper abdominal area.
B) The patient cleans the skin with soap and water before insulin administration.
C) The patient stores the insulin in the freezer after administering the prescribed dose.
D) The patient pushes the plunger down while removing the syringe from the injection site.