A male client with a recent diagnosis of bipolar disorder takes lithium carbonate daily. The client informed the school nurse of the desire to live away from home to attend college after graduating in one month. Which information is most important for the nurse to provide the client and his family?

A. While participation in therapy may be beneficial, the most important consideration with lithium therapy is monitoring serum levels to ensure therapeutic efficacy and avoid toxicity. B. Lithium therapy requires regular monitoring of serum levels to maintain therapeutic efficacy and prevent toxicity, especially during times of transition or stress such as starting college C. While it is important for the client to be aware of the signs and symptoms of his illness, routine monitoring of serum lithium levels is more crucial for maintaining stability while living away from home. D. While independence is a positive goal, the focus in this scenario should be on ensuring the client's safety and stability through appropriate monitoring of lithium levels.