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: Of the two sororities that were established at the University of Alabama, which has the most chapters worldwide? Passage 1:Greek letter organizations (GLOs) first appeared at the university in 1847 when two men visiting from Yale University installed a chapter of Delta Kappa Epsilon. When DKE members began holding secret meetings in the old state capitol building that year, the administration strongly voiced its disapproval. Over a few more decades, 7 other fraternities appeared at UA: Alpha Delta Phi in 1850, Phi Gamma Delta in 1855, Sigma Alpha Epsilon in 1856 (this was the founding chapter), Kappa Sigma in 1867, Sigma Nu in 1874, Sigma Chi in 1876, and Phi Delta Theta in 1877. Anti-fraternity laws were imposed that year, but were lifted in the 1890s. Women at the university founded the Zeta chapter of Kappa Delta sorority in 1903. Alpha Delta Pi soon followed.
 Passage 2:Heutz joined Imperial College London in 2007 as a Royal Society Dorothy Hodgkin Research Fellow. She was awarded the 2008 Institute of Materials, Minerals and Mining Silver Medal for her research on organic thin films. In particular she had developed new electron - donor morphologies for efficient solar cells. Heutz specialises in the use of electron paramagnetic resonance (EPR) to monitor unpaired electrons within materials. She used EPR to monitor spins within copper phthalocyanine solar cells. Whilst working on new materials for photovoltaics, Heutz showed that electrons in copper phthalocyanine (a blue pigment found in a Bank of England £5 note) exist in a superposition of two different spin states. She demonstrated that copper phthalocyanine could be used for quantum computing, where information is stored as qubits as opposed to binary bits.
 Passage 3:Born in Kidbrooke, London, Stanislas first joined West Ham United as a schoolboy at the age of 10. In May 2006, Stanislas signed a three-year academy scholarship. He made his Premier Academy League debut in a 3–2 defeat to Watford on 8 April 2006, at the age of 16. He became a regular for the Academy in the 2006–07 season, appearing 26 times and scoring 9 goals as West Ham finished as runners-up to Arsenal. He carried his goalscoring form into the 2007–08 season, scoring 10 goals in 24 appearances. He made his Premier Reserve League debut on 29 August 2007, in a 2–1 defeat to Aston Villa. His first goals came in the 8–0 rout over Derby County, as he netted a brace. He was part of the first-team squad that travelled to North America in the summer of 2008 for the pre-season tour. He started the 2008–09 season in the reserves, scoring his first goal of the season on 21 October 2008, in a 1–0 home win over Arsenal.

Solution:
1