The practical nurse (PN) is observing a client self-administer the morning dose of subcutaneous insulin. For which component of the injection technique should the PN provide the client with additional information?

Removes any air bubbles in syringe to ensure correct dosage.

Injects into the same site selected for the previous dose.

Uses a circular action when applying an alcohol pad to the site.

Injects air into the insulin vial to displace the dose.