The nurse is teaching a male adolescent recently diagnosed with type 1 diabetes mellitus (DM) about self-injecting insulin. Which approach is best for the nurse to use to evaluate the effectiveness of the teaching?

Have the adolescent list the procedural steps for safe insulin administration.

Review his glycosylated hemoglobin level 3 months after the teaching session.

Observe him as he demonstrates the self-injection technique to another diabetic adolescent.

Ask the adolescent to describe his level of comfort with injecting himself with insulin.