Final answer:
The nurse practitioner should reassure the parents that occasional arguments are normal and provide resources for financial counseling to help them manage their financial stress.
Step-by-step explanation:
When faced with parents who frequently fight about money, the nurse practitioner should prioritize the well-being of the child. Instead of advising the parents to separate, which might not always be the best solution, the nurse practitioner can reassure the parents that occasional arguments are normal. This helps alleviate some anxiety the parents may have about the impact on the child. Additionally, the nurse practitioner should provide resources for financial counseling to help the parents in managing their financial stress.