The correct answer is D - multiple fractures and prednisone prescription. The multiple fractures may indicate a metabolic problem such as osteoporosis or a more severe problem of pathological fractures due to metastatic cancer (the patient mentioned prostate medication, but prostate cancer is not uncommon as men age). Prednisone intake on a chronic basis can also induce bone fragility.
Although the patient has emphysema, he receives appropriate treatment and only requires oxygen in the evening.