Final answer:
The nurse's best response in this situation is to reassure the client and offer assistance with a shower.
Step-by-step explanation:
The best response by the nurse in this situation would be option b) 'You're safe here, and we can help you with a shower.' This response acknowledges the client's concerns for her husband but also provides reassurance that she is safe and offers assistance with taking a shower. It is important to address the client's hallucinations and delusions with empathy and understanding, while also providing factual information and promoting a safe environment.