A Patient Who Has Type 1 Diabetes Mellitus Asks the Nurse

A patient who has type 1 diabetes mellitus asks the nurse about using a combination insulin product such as Humalog 75/25.The nurse will tell the patient that use of this product

A) depends on individual insulin needs.
B) is useful for patient with insulin resistance.
C) means less rotation of injection sites.
D) requires refrigeration at all times.