A patient undergoing radiation therapy for lung cancer reports severe fatigue that is impacting daily activities. The nurse reviews the patient's laboratory results and notes a low hemoglobin level. What is the most appropriate nursing intervention to address the patient's fatigue?

Suggest that the patient increase caffeine intake to boost energy levels temporarily.

Encourage the patient to participate in a regular exercise program to improve stamina.

Consult with the healthcare provider about initiating iron supplementation for anemia management.

Advise the patient to take short naps throughout the day to manage fatigue: