Final answer:
The action that indicates that additional teaching is necessary is when the client needs to self-administer insulin to increase blood glucose levels after consuming a large or high-glucose meal.
Step-by-step explanation:
The action that indicates that additional teaching is necessary is option d: Insulin injections allow transport and storage of glucose to decrease blood glucose levels after consuming a large or high-glucose meal.
When someone with diabetes takes insulin injections to decrease blood glucose levels, it means that their blood sugar is already high. In this case, the teaching should focus on preventing high blood sugar by managing meal intake and adjusting insulin dosage accordingly. Therefore, if the client is self-administering insulin to increase blood glucose levels, it indicates a lack of understanding and the need for additional teaching.
In summary, if a client needs to self-administer insulin to increase blood glucose levels after consuming a large or high-glucose meal, it indicates that further teaching is necessary.