Final answer:
The best response by the nurse is to demonstrate how to change the colostomy bag and let the daughter practice, ensuring she learns the necessary skills to care for her mother's colostomy.
Step-by-step explanation:
When the daughter expresses uncertainty about caring for her mother's new colostomy, the appropriate response by the nurse is option C: 'I'll demonstrate how to change the colostomy bag, and then you can try.' This approach allows the daughter to learn through observation and then practice under the nurse's supervision, ensuring she gains the confidence and skill necessary to provide care. It also addresses the immediate need for education and support. While scheduling a home health nurse or suggesting the daughter will get used to it over time can be helpful, active hands-on learning is often the most effective way to ensure proper care is provided post-discharge.