Final answer:
When a patient is dying and experiencing breathlessness, it is important to acknowledge and validate their symptoms, provide reassurance and take steps to relieve their discomfort.
Step-by-step explanation:
If a patient is dying, the appropriate response to their feelings of breathlessness would be C) Acknowledge and validate, reassure and provide relief measures. It is essential to address their symptoms with compassion and understanding, affirming their experience and offering comfort. Implementing measures to assist in easing these symptoms, such as providing supplemental oxygen, raising the head of the bed, or administering prescribed medication to alleviate discomfort, is crucial in patient care during this time.