Question: Which of the following films is a documentary about a London, Midland, and Scottish Railway mail train: Night Mail or What Would Jesus Buy?

full_context: Document 1: What Would Jesus Buy?: What Would Jesus Buy? is a 2007 documentary film produced by Morgan Spurlock and directed by Rob VanAlkemade. The title is a take-off on the phrase "What would Jesus do?". The film debuted on the festival circuit on March 11, 2007, at the South By Southwest (SXSW) conference in Austin, Texas. It went into general U.S. release on November 16, 2007.
Document 2: Target for Tonight: Target for Tonight is a 1941 British documentary film billed as filmed and acted by the Royal Air Force, all while under fire. It was directed by Harry Watt. The film is about the crew of a Wellington bomber partaking in a mission over Germany. The film won an honorary Academy Award in 1942 as 'Best Documentary' by the National Board of Review.
Document 3: John Grierson: John Grierson CBE (26 April 1898 – 19 February 1972) was a pioneering Scottish documentary maker, often considered the father of British and Canadian documentary film. In 1926, Grierson coined the term "documentary" in a review of Robert Flaherty's "Moana".
Document 4: For the Bible Tells Me So: For the Bible Tells Me So is a 2007 American documentary film directed by Daniel G. Karslake about homosexuality and its perceived conflict with Christianity, as well as various interpretations of what the Bible says about same-sex sexuality.
Document 5: John Betjeman Goes by Train: John Betjeman Goes By Train is a 1962 short documentary film made by British Transport Films and BBC East Anglia. The 10-minute-long film features future poet laureate John Betjeman as he takes a memorable journey by train from King's Lynn railway station to Hunstanton railway station in Norfolk, pointing out various sights and stopping off at Wolferton station on the Sandringham Estate and Snettisham station, where he extolls the virtues of rural branchline stations. An early example of a Betjeman travelogue film, a similar idea was later used for his 1973 documentary "Metro-land".
Document 6: A Sacred Duty: A Sacred Duty, subtitled "Applying Jewish values to help heal the world," is a 2007 60-minute documentary from Jewish Vegetarians of North America (JVNA), written and produced by Lionel Friedberg. The film focuses on Jewish teachings about caring for the earth, treatment of animals, and the environment, with a focus on vegetarianism. Interviews with rabbis, activists, and scholars are interspersed with footage and stills illustrating the points being discussed.
Document 7: Where in the World Is Osama bin Laden?: Where in the World Is Osama Bin Laden? is a 2008 documentary film, conceived by Adam Dell and co-written, produced, directed by and starring Morgan Spurlock, an American independent filmmaker.
Document 8: Night Mail: Night Mail is a 1936 documentary film about a London, Midland and Scottish Railway (LMS) mail train from London to Scotland, produced by the GPO Film Unit. The film ends with a "verse commentary" by W. H. Auden, written for existing footage. Benjamin Britten scored the film. The film was directed by Harry Watt and Basil Wright, and narrated by John Grierson and Stuart Legg. The Brazilian filmmaker Alberto Cavalcanti was sound director. The locomotive featured in the film was Royal Scot 6115 "Scots Guardsman", built in 1927. The film has become a classic of its own kind, much imitated by adverts and modern film shorts. "Night Mail" is widely considered a masterpiece of the British Documentary Film Movement.
Document 9: Jesus Camp: Jesus Camp is a 2006 American documentary film directed by Rachel Grady and Heidi Ewing about a Charismatic Christian summer camp, where children spend their summers being taught that they have "prophetic gifts" and can "take back America for Christ". According to the distributor, it "doesn't come with any prepackaged point of view" and attempts to be "an honest and impartial depiction of one faction of the evangelical Christian community".
Document 10: Search for the Truth (film): Search for the Truth (also known by the name Jesus Christ/Joseph Smith in its DVD form) is an anti-Mormon video produced by Tri-Grace Ministries. The video begins with the claim that Jesus Christ and Joseph Smith were “two of the worlds most prominent and influential men.” It then presents what it claims to be the teachings of Joseph Smith and contrasts them to what it claims to be the teachings of Jesus Christ. A question is raised regarding whether the movements which the video classifies as “Christianity” and “Mormonism” are compatible, despite the claim by both that “Jesus is the Christ.” The video takes portions of the Book of Mormon and compares it to the Bible. The video implies that you have to follow Jesus or Joseph Smith but not both.
Document 11: Go Further: Go Further is a 2003 documentary film by Ron Mann starring Woody Harrelson and a group of other environmental activists riding around in a large, bio-fueled bus. The tour was called the Simple Organic Living Tour and it was produced by cause-related marketers the Spitfire Agency. The film debuted at the South by Southwest Film Festival in March 2003, and at the Toronto International Film Festival in September 2003, where it was first runner-up for the People's Choice Award. It was also nominated for a Genie Award for Best Documentary. The film features cameos by Dave Matthews, Natalie Merchant, Ken Kesey, Bob Weir (of the Grateful Dead), Michael Franti (of Spearhead), Anthony Kiedis (of Red Hot Chili Peppers), Rob Heydon, Medeski Martin & Wood, and The String Cheese Incident.
Document 12: Night Mail (1935 film): Night Mail is a 1935 British film. It is not to be confused with the 1936 documentary "Night Mail".
Document 13: Powell and Pressburger: The British film-making partnership of Michael Powell (1905–1990) and Emeric Pressburger (1902–1988)—together often known as The Archers, the name of their production company—made a series of influential films in the 1940s and 1950s. —24 films between 1939 and 1972—were mainly derived from original stories by Pressburger with the script written by both Pressburger & Powell. Powell did most of the directing while Pressburger did most of the work of the producer and also assisted with the editing, especially the way the music was used. Unusually, the pair shared a writer-director-producer credit for most of their films. The best known of these are "The Life and Death of Colonel Blimp" (1943), "A Canterbury Tale" (1944), "A Matter of Life and Death" (1946), "Black Narcissus" (1947), "The Red Shoes" (1948), and "The Tales of Hoffmann" (1951).
Document 14: The Story of Stuff: The Story of Stuff is a short animated documentary about the lifecycle of material goods. The documentary is critical of excessive consumerism and promotes sustainability.
Document 15: Listen to Britain: Listen to Britain is a 1942 British propaganda short film by Humphrey Jennings and Stewart McAllister. The film was produced during World War II by the Crown Film Unit, an organisation within the British Government's Ministry of Information to support the Allied war effort. The film was nominated for the inaugural Academy Award for Documentary Feature in 1943, but lost against four other Allied propaganda films. It is noted for its nonlinear structure and its use of sound.
ground_truth: Night Mail