A 79-year-old man had a chest x-ray because of a history of smoking. However, a calcified gallbladder was noted. This was confirmed by CAT scan. The patient is asymptomatic and has no medical illnesses. The next step in the management of this patient should be:
Cholecystectomy CT-guided percutaneous core needle biopsy Cholecystectomy with pancreaticoduodenectomy Cholecystostomy