You are answering a USMLE-style medical question. Question: A 75-year-old man is admitted to the hospital because of a 3-day history of a productive cough and shortness of breath. His temperature is 38°C (100.4°F) and respirations are 32/min. Crackles are heard over the right upper and the entire left lung fields. Sputum culture confirms infection with Streptococcus pneumoniae. Despite appropriate therapy, the patient dies. A photomicrograph of a section of the lung obtained during the autopsy is shown. Which of the following mediators is most likely responsible for the presence of the cell-type indicated by the arrow? Options: A) Platelet activating factor B) Interferon-gamma C) Interleukin-10 D) Leukotriene D4 Reply with ONLY the letter of the correct answer (A, B, C, or D). No explanation.