A nurse is reinforcing teaching with a client who has diabetes mellitus and a new prescription for lispro and Lantus insulins. Which of the following statements by the client indicates an understanding of the teaching?

"Insulin injected into the thigh is the most rapidly absorbed."

"I should shake the botle of insulin before withdrawing the medication."

"I will use Lantus insulin immediately before each meal."

"Unopened vials of insulin should be kept in my refrigerator."