A 35-year-old man presents with a bleeding duodenal ulcer documented by endoscopy. The patient is somewhat unstable, and bleeding does not stop despite transfusing 8 U of blood. What is the most appropriate surgical therapy?
Further blood transfusion alone Oversewing the ulcer alone Oversewing the ulcer and performing a gastrojejunostomy Oversewing the ulcer and performing a vagotomy and pyloroplasty