Endoscopy — ERCP Distal CBD Stone with Sphincterotomy

A 58-year-old woman presents with painless jaundice, dark urine, and pale stools. Laboratory investigations show conjugated hyperbilirubinemia (total bilirubin 5.2 mg/dL) and elevated alkaline phosphatase. Abdominal ultrasound reveals gallstones and a dilated common bile duct (CBD) measuring 11 mm. ERCP is performed with a side-viewing duodenoscope. The cholangiogram demonstrates the finding marked **D** — a round 12 mm filling defect in the distal CBD with a meniscus sign, consistent with an impacted choledocholithiasis. Which of the following is the most appropriate next step in the management of this patient?