Final answer:
The best response by the nurse is to suggest Al-Anon, providing the client with a supportive resource and acknowledging her concern without judgment.
Step-by-step explanation:
The nurse's best response to a client expressing concerns about her husband's alcoholism and his trouble maintaining employment would be option a: "Have you tried to contact Al-Anon? I can help if you want." This response acknowledges the client's distress and offers a supportive resource without judgment or unnecessary probing into personal matters. Al-Anon is known for providing support to family members affected by someone else's drinking. By suggesting Al-Anon, the nurse gives the client an opportunity to seek help in a professional and structured environment that can provide coping strategies and support from people in similar situations.