When the Nurse Teaches a Skill Such as Self-Injection of Insulin

When the nurse teaches a skill such as self-injection of insulin to the patient, what is the best way to set up the teaching/learning session?

A) Provide written pamphlets for instruction.
B) Show a video, and allow the patient to practice as needed on his own.
C) Verbally explain the procedure, and provide written handouts for reinforcement.
D) After demonstrating the procedure, allow the patient to do several return demonstrations.