You are answering a USMLE-style medical question. Question: A 3-year-old boy is brought to the emergency department by ambulance after a motor vehicle accident. He is unconscious upon arrival and is found to have severe internal bleeding due to trauma. He is taken for emergency surgery and severely damaged tissues are removed. After surgery, the boy is taken into the PICU for recovery. Over the subsequent week, serial labs are drawn showing target cells, thrombocytosis, and leukocytosis. He is started on a prophylactic regimen that is continued upon discharge. Which of the following is consistent with the mechanism of action of the drug that was most likely prescribed in this case? Options: A) 30S ribosome inhibitor B) 50S ribosome inhibitor C) Cell wall cross-linking inhibitor D) DNA gyrase inhibitor Reply with ONLY the letter of the correct answer (A, B, C, or D). No explanation.