Final answer:
The nurse would know that the teaching was understood if the client says they will contact their doctor immediately upon noticing fine hand tremors or slurred speech, as these are serious neurological side effects of lithium carbonate.
Step-by-step explanation:
The client would demonstrate an understanding of the side effects of lithium carbonate and the need for immediate contact with their doctor if they stated, "I will call my doctor immediately once I notice any: B. Fine hand tremors or slurred speech." Lithium carbonate can lead to neurological side effects such as fine hand tremors, which can be a sign of lithium toxicity. Slurred speech is another serious side effect that requires prompt medical attention. The nurse's teaching would be considered effective if the client is aware of the potential for these side effects and knows to report them immediately.