You are answering a USMLE-style medical question. Question: A 58-year-old woman presents to the emergency department because of worsening abdominal pain for the past 2 days. She reports nausea and vomiting and is unable to tolerate oral intake. She appears uncomfortable. Her temperature is 38.1°C (100.6°F), the pulse is 92/min, the respirations are 18/min, and the blood pressure is 132/85 mm Hg. Physical examination shows yellowish discoloration of her sclera. Her abdomen is tender in the right upper quadrant. There is no abdominal distention or organomegaly. The laboratory tests show the following results: Hemoglobin 13 g/dL Leukocyte count 16,000/mm3 Urea nitrogen 25 mg/dL Creatinine 2 mg/dL Alkaline phosphatase 432 U/L Alanine aminotransferase 196 U/L Aspartate transaminase 207 U/L Bilirubin Total 3.8 mg/dL Direct 2.7 mg/dL Lipase 82 U/L Ultrasound of the right upper quadrant shows dilated intrahepatic and extrahepatic bile ducts and multiple hyperechoic spheres within the gallbladder. The pancreas is not well visualized. Intravenous fluid resuscitation and antibiotic therapy with ceftriaxone and metronidazole are initiated. After 12 hours, the patient appears acutely ill and is not oriented to time. Her temperature is 39.1°C (102.4°F), the pulse is 105/min, the respirations are 22/min, and the blood pressure is 112/82 mm Hg. Which of the following is the most appropriate next step in management? Options: A) Endoscopic retrograde cholangiopancreatography (ERCP) B) Laparoscopic cholecystectomy C) Magnetic resonance cholangiopancreatography (MRCP) D) Percutaneous cholecystostomy Reply with ONLY the letter of the correct answer (A, B, C, or D). No explanation.