Detailed Instructions: In this task, you're given a question, along with three passages, 1, 2, and 3. Your job is to determine which passage can be used to answer the question by searching for further information using terms from the passage. Indicate your choice as 1, 2, or 3.
Problem:Question: Who had killed Stephanie Brown in War Crimes? Passage 1:Besides the aforementioned death of Stephanie Brown, many other side effects came about from this event. The biggest of these included Black Mask becoming the single crime boss in Gotham, something that would remain until his death at the hands of Catwoman. Another would be Commissioner Akins effectively making all vigilantes criminals, a move that would stay in place for over a year until the return of Commissioner Gordon to the Gotham City Police Department. The more controversial effect, not seen until the follow-up story War Crimes, was turning Doctor Leslie Thompkins against Batman, when she allows Stephanie Brown to die from her wounds as Batman's "punishment" for including children in his war on crime. Jason Todd, a former Boy Wonder, confirmed to be alive on as a violent vigilante the Red Hood who waged a one-man war against Black Mask and successfully crippling his criminal operation in the city before seeking revenge towards Batman and the Joker. Finally, the citizens of Gotham City no longer consider Batman to be an urban legend (which has been in place since Zero Hour), as he was caught on camera trying to save the life of a wounded student at the end of Act One. Additionally, Barbara Gordon lost the clock tower that served as her home and headquarters and left Gotham City, eventually moving to Metropolis. She would later re-establish her ties to Batman.
Passage 2:After the outbreak of the First World War, a priority for the Royal Navy was to secure the approaches to the English Channel, to prevent elements of the German High Seas Fleet from breaking out into the Atlantic, or from interfering with British maritime trade and convoys to the continent. Most of the major fleet units of the Grand Fleet had dispersed to the navy's anchorage at Scapa Flow or to other North Eastern ports to monitor the northern route from the North Sea into the Atlantic. Consequently, a number of patrol flotillas were organised along the south and east coasts of England, with commands established at several of the major ports in the region. The Dover Patrol was based at Dover, consisting mostly of destroyers, while a number of pre-dreadnoughts and cruisers were based at Portland Harbour. A large number of destroyers, flotilla leaders and light cruisers were centred at Harwich, under the command of Commodore Reginald Tyrwhitt.
Passage 3:USS Sachem was originally commanded by Captain H. W. Morris, the former U.S. Navy commander of New Orleans, and was armed with one 20lb (0.91kg) parrott rifle and four 32 pounder (15kg) cannons. The size of her crew was about fifty; she had also participated in several other historic naval engagements such as Hampton Roads and the Battle of Forts Jackson and St. Philip. Captain Morris is not believed to have fought in this battle. Lieutenant Amos Johnson commanded Sachem. Lieutenant John W. Kittredge was in charge of Arthur, which held over eighty men and was armed with six 32 pounder smooth-bore guns. Kittredge commanded the flotilla and Arthur was the flagship of the force. Corypheus mounted one 30lb (14kg) rifled gun and one 24 pounder (11kg) howitzer. She had a crew of twenty-eight men and was commanded by Acting Master A. T. Spear. Bella Italias armament and crew are not known. Reindeer mustered six 24 pounder howitzers. Little is known of the Confederate ships.

Solution:
1