A nurse is reinforcing teaching with a client who has diabetes mellitus about using a glucometer to monitor her blood glucose. Which of the following actions should the nurse identify as an indication that the client understands the instructions?

B Avoids using the thumbs as puncture sites D Uses the ball of a finger as the puncture site A Avoids using the fingers of her dominant hand as puncture sites. C Uses the side of a fingertip as the puncture site