A nurse is reinforcing teaching with a client who has bipolar disorder and has a new prescription for lithium.To address possible adverse effects, the nurse should include that which of the following laboratory values will be monitored while the client is taking this medication?

Choice A rationaleMonitoring liver enzymes is important for medications that can cause hepatotoxicity, but lithium primarily affects the kidneys and electrolyte balance.Choice B rationaleSodium levels must be monitored while taking lithium because lithium can alter sodium and fluid balance. Changes in sodium levels can affect lithium levels and potentially lead to toxicity.Choice C rationaleUric acid levels are monitored with medications that can cause hyperuricemia, such as diuretics, but not typically for lithium therapy.Choice D rationaleErythrocyte sedimentation rate (ESR) is a nonspecific marker of inflammation and is not specifically monitored for clients taking lithium. .