A 52-year-old insulin-dependent diabetic man is evaluated for vague epigastric pain, is diagnosed with GERD, and is treated with proton pump inhibitors with resolution of symptoms. In the course of the workup, however, an abdominal ultrasound was performed. No gallstones were seen, but an incidental 12 mm polyp was found within the gallbladder. What is the next best step in management?
(A) Laparoscopic cholecystectomy
(B) Open cholecystectomy
(C) Percutaneous gallbladder drainage
(D) Endoscopic ultrasound
(E) Repeat ultrasound in 6 months