<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:A 75-year-old man presents to the physician with difficulty breathing for the last 2 months. He denies any cough, fever, or chest pain. His past medical history is significant for hypertension for which he takes chlorothiazide. He has worked in the construction industry, applying insulation to roofs for over 20 years. He denies smoking, drinking, and illicit drug use. His pulse rate is 74min, respiratory rate is 14min, blood pressure is 13076 mm Hg, and temperature is 36.8C 98.2F. Physical examination reveals some end-inspiratory crackles at the lung bases. No other examination findings are significant. The lung inflation curve is obtained for the patient and is shown in the image. Which of the following most likely accounts for this patients symptoms?? A: Normal aging, B: Alpha-1 antitrypsin deficiency, C: Asthma, D: Idiopathic pulmonary hypertension, E: Pulmonary fibrosis,  <response>: This is a clinical vignette describing a 75-year-old man with 2 months of progressive dyspnea. Key findings include occupational asbestos exposure, absence of coughfeverchest pain, end-inspiratory crackles on exam, and a restrictive pattern on pulmonary function testing. The differential diagnosis includes:- Pulmonary fibrosis: Most likely given his occupational asbestos exposure and restrictive PFTs. Asbestos is a known cause of pulmonary fibrosis. - Idiopathic pulmonary fibrosis: Less likely given known asbestos exposure, but possible.- Heart failure: Unlikely given lack of supporting history or exam findings. - Asthma: Unlikely given lack of wheezing, cough, or evidence of airflow obstruction on PFTs.- Alpha-1 antitrypsin deficiency: Unlikely given lack of supporting history and late onset of symptoms.- Pulmonary hypertension: Unlikely given lack of supporting history or exam findings.E: Pulmonary fibrosis 