Question: The Oregon Trail is a 2009 iOS and DSiware version of a computer game that was designed to teach school children about the realities of pioneer life in what century?

Context paragraphs:
The Oregon Trail (video game): The Oregon Trail is a computer game originally developed by Don Rawitsch, Bill Heinemann, and Paul Dillenberger in 1971 and produced by the Minnesota Educational Computing Consortium (MECC) in 1974.  The original game was designed to teach school children about the realities of 19th-century pioneer life on the Oregon Trail.  The player assumes the role of a wagon leader guiding a party of settlers from Independence, Missouri, to Oregon's Willamette Valley via a covered wagon in 1848.

The Oregon Trail (2011 video game): The Oregon Trail (also known as The Oregon Trail 40th Anniversary Edition) is a 2011 version of the 1971 video game "The Oregon Trail".  The virtual life game was developed by SVG Distribution and published by Crave Entertainment on December 6, 2011 for the Wii and Dec 13, 2011 for 3DS.

The Oregon Trail (series): The Oregon Trail is a series of educational computer games that began with the very first edition originally developed by Don Rawitsch, Bill Heinemann, and Paul Dillenberger in 1971 and produced by the Minnesota Educational Computing Consortium (MECC) in 1974.  The original game was designed to teach school children about the realities of 19th-century pioneer life on the Oregon Trail.  The player assumes the role of a wagon leader guiding a party of settlers from Independence, Missouri, to Oregon's Willamette Valley via a covered wagon in 1848.

Oregon Trail II: Oregon Trail II is an educational video game released by MECC in 1995.  It was published by SoftKey Multimedia.  It is a revised version of the original "Oregon Trail" computer game.  It was redesigned with the help of American Studies PhD Wayne Studer.  In contrast to the original version of the game, "Oregon Trail II" made an effort to include greater roles for women and racial minorities.

The Amazon Trail: The Amazon Trail is an educational computer game created by MECC.  It was inspired by the popularity of "The Oregon Trail", featuring the areas surrounding the Amazon River and some of its tributaries.  In this 2-D adventure, the player is asked to set out on a journey up the Amazon, hoping to make it to the lost Inca village of Vilcabamba.  Along the way, the player learns about the people who live on and use the river for their survival.  "The Amazon Trail" is known for being significantly more difficult than its predecessors in the franchise, such as "The Oregon Trail".  There are two sequels, "Amazon Trail II" and "Amazon Trail 3rd Edition".  It was released in 1994.

The Oregon Trail 3rd Edition: The Oregon Trail 3rd Edition (full title: The Oregon Trail 3rd Edition: Pioneer Adventures) is the second sequel to the 1982 edutainment video game "The Oregon Trail" after "Oregon Trail II".  It was developed by MECC and released on Dec 31, 1997.

Oregon Trail School District: The Oregon Trail School District is a public school district in the U.S. state of Oregon.  It spans 424 sqmi from the outskirts of the city of Gresham to the top of Mount Hood, on the Oregon Trail.  It encompasses several distinct, mostly unincorporated, rural areas of Clackamas County, including the communities along the Mount Hood Corridor, Boring, and the city of Sandy.  The district serves approximately 4,200 students.  There are five elementary schools, three middle schools, Oregon Trail Academy, a K-12 IB charter school, and one high school, Sandy High School.

Oregon Trail Memorial Association: The Oregon Trail Memorial Association (OTMA) was an American organization founded by pioneer Ezra Meeker in 1922 as the Old Oregon Trail Association to memorialize those who traveled to the U.S. West Coast via the Oregon Trail.  The group was incorporated in New York in early 1926 as the Oregon Trail Memorial Association.  The organization is best known for promoting the Oregon Trail Memorial half dollar.  It was succeeded by the American Pioneer Trails Association (APTA) in 1940.  Oregon-California Trails Association is considered a successor to OTMA.

The Oregon Trail (2009 video game): The Oregon Trail is a 2009 iOS and DSiware version of the 1982 video game "The Oregon Trail".  The simulation game was published by Gameloft.

The Oregon Trail: American Settler: The Oregon Trail: American Settler (also known as "The Oregon Trail: Settler") is a freemium game developed by Gameloft and released on November 17, 2011.  It is a spin-off of the 1982 video game "The Oregon Trail".  The game was released in twelve different languages including English, Spanish, French, German, Italian, Japanese, Korean, Portuguese, Russian, Standard Chinese, Simplified Chinese and Traditional Chinese.

Supporting paragraphs: The Oregon Trail (2009 video game) The Oregon Trail (video game)
Answer: 19th-century