You are answering a USMLE-style medical question. Question: A 34-year-old woman presents to the plastic surgery office 3 months following a rhinoplasty procedure. The patient has been recovering well. However, she has noticed a small whistling noise when she respires through her nose, which you appreciate on physical exam. Which of the following is the most likely cause of this phenomenon? Options: A) Post-operative swelling B) A septal hematoma causing a perforation C) A deviated septum that is now straight, resulting in altered nasal airflow D) Excessive columellar show resulting in increased nasal airflow Reply with ONLY the letter of the correct answer (A, B, C, or D). No explanation.