An Elderly Patient with a Medical Diagnosis of Chronic Lung

An elderly patient with a medical diagnosis of chronic lung disease has developed pneumonia. She is coughing frequently and expectorating thick, sticky secretions. She is very short of breath, even with oxygen running, and she is exhausted and says she "can't breathe." Based on this information, an appropriately worded nursing diagnosis for this patient is

A) Airway clearance, ineffective, related to lung secretions as evidenced by cough and shortness of breath.
B) Pneumonia, cough, and shortness of breath related to chronic lung disease.
C) Difficulty breathing not relieved by oxygen and evidenced by shortness of breath.
D) Cough and shortness of breath caused by pneumonia, chronic lung disease, advanced age, and exhaustion.