<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:A 55-year-old woman comes to the physician with a 6-month history of cough and dyspnea. She has smoked 1 pack of cigarettes daily for the past 30 years. Analysis of the sputum sample from bronchoalveolar lavage shows abnormal amounts of an isoform of elastase that is normally inhibited by tissue inhibitors of metalloproteinases TIMPs. The cell responsible for secreting this elastase is most likely also responsible for which of the following functions?? A: Production of lactoferrin, B: Degradation of toxins, C: Diffusion of gases, D: Phagocytosis of foreign material, E: Secretion of mucus,  <response>: This is a medical question asking about the likely cell type that is secreting an abnormal isoform of elastase in a patient with chronic cough and dyspnea who has a history of smoking. The elastase is normally inhibited by TIMPs. The question asks which other function this cell type is responsible for. Based on the patient history of smoking and symptoms of cough and dyspnea, this implicates lung involvement. Elastase is involved in breaking down elastic fibers, and its abnormal secretion implicates destruction of lung parenchyma. The cell type that secretes elastase and is found in the lungs is most likely a phagocytic cell involved in immune defense. Of the answer choices, phagocytosis of foreign material would be the most likely additional function of this cell type.D: Phagocytosis of foreign material 