A nurse is caring for a client who is experiencing acute alcohol withdrawal. The nurse should anticipate administering which of the following medications to the client to facilitate the withdrawal process?

A. Varenicline. Varenicline is used to aid smoking cessation by reducing nicotine cravings and withdrawal symptoms. It does not have a role in managing acute alcohol withdrawal and would not be effective in preventing withdrawal-related complications. B. Diazepam. Diazepam, a benzodiazepine, is commonly used to manage acute alcohol withdrawal by preventing seizures, reducing agitation, and alleviating autonomic hyperactivity (e.g., tachycardia, hypertension). It enhances GABA activity, which helps counteract the excitatory effects of alcohol withdrawal, reducing the risk of delirium tremens (DTs). C. Clonidine. Clonidine is an alpha-2 agonist that helps control autonomic symptoms such as elevated blood pressure and heart rate. While it may be used as an adjunct therapy, it does not prevent seizures or delirium, making it insufficient as a primary treatment for alcohol withdrawal. D. Methadone. Methadone is used for opioid withdrawal and maintenance therapy in opioid dependence. It does not alleviate alcohol withdrawal symptoms or prevent complications such as seizures or delirium, making it inappropriate for this condition.