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: What position did George McClellan hold in the American Civil War? Passage 1:Keith Cerny is an American opera director and businessman. From 2004-2007 he was Executive Director and CFO of the San Francisco Opera and from 2010-2018 he was General Director of the Dallas Opera. In 2018 he was appointed General Director of the Calgary Opera. He is also the former CEO of Sheet Music Plus (2008-2010), the world's largest interest-based sheet-music company. He is a graduate of the University of California, Berkeley (B.A. in Music and B.S. in Physics), the Harvard Business School (M.B.A.), and the Open University in the United Kingdom (Ph.D. in Economic Development Studies/Econometrics). He also studied conducting, voice, and accompanying at the Guildhall School of Music and Drama in London and studied opera-accompanying in English National Opera's repetiteur training course. He also worked for McKinsey & Company for six years where he was a Senior Engagement Manager, and seven years with the consulting firm Accenture. He is also an Executive Board Member for Opera America.
Passage 2:The October Trio is a Canadian jazz trio from Vancouver consisting of Josh Cole (bass), Dan Gaucher (drums), and Evan Arntzen (saxophone). Formed in 2004, the three met as students at Capilano College while studying jazz. Their influences are cited as being diverse, ranging from Vespertine-era Bjork to the Wayne Shorter Quartet to local talents. In March 2005, they became the regular performers at the Rime, a new music hub located in East Vancouver. There, they recorded their first live album, Live at Rime in 2005. The trio released their studio album, Day In, in 2006 and in the same year, earned the title Canadian Broadcasting Corporation's Galaxie Rising Star Award for best new group at the Vancouver International Jazz Festival. The album was also nominated for a 2007 Western Canadian Music award for Jazz Album of the year. After the album, the trio began collaborating with jazz trumpeter Brad Turner in 2007 and released the album Looks Like It's Going to Snow in 2009. Turner, had previously produced Day In and is also the producer for the new record. The album is noted for its lyricism and rich arrangements. One review notes that "it easily and off-handedly incorporates funk and rock elements without becoming a collection that is dominated by a backbeat aesthetic." The band is also noted for its rhythmic complexity, as songwriter Cole enjoys the frequent play with irregular time signatures and unusual phrase lengths. The trio has also opened for Dave Holland and the Monterey Quartet.
Passage 3:When the American Civil War began, Weitzel was assigned to construct defenses, including in Cincinnati and Washington, as well as for George McClellan in the Army of the Potomac in late 1861. He was then attached to the staff of Major General Benjamin F. Butler as chief engineer of the Department of the Gulf. When Union troops captured New Orleans, Weitzel became assistant military commander and acting mayor. He was promoted to brigadier general in August 1862 and two months later routed a large force of the enemy at Labadieville, Louisiana, which earned him a brevet promotion to major in the Regular Army. Weitzel commanded a brigade in the XIX Corps advancing in Major General Nathaniel P. Banks's operations in western Louisiana during April and May 1863, which led to the siege of Port Hudson. Weitzel was later brevetted lieutenant colonel in the Regular Army, "for gallant and meritorious services at the siege of Port Hudson," which fell on July 9, 1863, days after Vicksburg, Mississippi, about 120 miles upriver, the last Confederate stronghold on the great Mississippi, had fallen. Together those successful sieges and the continuing blockage of Southern ports completed the Anaconda Plan.

Solution:
3