Final answer:
The best non-pharmacological intervention for a client with a terminal illness receiving palliative care would be promoting regular visits by family members and spiritual leaders, which aligns with the holistic approach of hospice care that emphasizes psychological and emotional support.
Step-by-step explanation:
The nurse is providing palliative care to a client with a terminal illness. Among the given options, the intervention that would best promote non-pharmacological care and comfort support for this client is C. Promoting regular visits by family members and spiritual leaders. Hospice care, with its focus on comfort and peace rather than cure, greatly values the emotional and psychological aspects of patient care. Research has confirmed that patients receiving hospice care benefit from the emotional support and familiarity of being at home, resulting in higher levels of patient and family satisfaction. Regular visits from loved ones and spiritual guidance can provide immense comfort and support, enhancing the patient's quality of life during their terminal phase.
While prescribing medication (option A) and measuring pain (option D) are important components of palliative care, they are pharmacological and assessment methods, respectively, and do not fall under non-pharmacological interventions. Offering favorite foods (option B) could contribute to comfort, yet it does not hold the same profound impact on emotional well-being as the comprehensive support system provided by family and spiritual care.