This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Substance Related and Addictive Disorders, Subject name: Psychiatry
A 57-year-old male patient with a history of alcoholism has decided to stop drinking. Of the following, the agent most commonly used to treat anxiety and agitation associated with the initial stages of alcohol withdrawal is 
Select and explain. 
A. zaleplon, B. flurazepam, C. clonazepam, D. chlordiazepoxide
D: chlordiazepoxide
Answer: D: chlordiazepoxide 
Explanation: Chlordiazepoxide Because it is long-acting and has relatively low abuse potential, chlordiazepoxide is the antianxiety agent most commonly used to treat the anxiety and agitation associated with the initial stages of alcohol withdrawal.