Question: What company owns the rights to both the Radiator Springs Racers and Test Track attractions?

Context paragraphs:
Test Track: Test Track is a high speed giant slot car attraction at Epcot at the Walt Disney World Resort in Bay Lake, Florida.  The ride is a simulated excursion through the rigorous testing procedures that General Motors uses to evaluate its concept cars, culminating in a high-speed drive around the exterior of the attraction.  It closed for refurbishment on April 15, 2012 and re-opened on December 6, 2012.  It is now sponsored by the Chevrolet brand rather than General Motors as a whole, who sponsored the attraction from 1999 until the refurbishment.

Nardò Ring: The Nardò Ring, originally known as Pista di prova di Nardò della Fiat (Fiat's Nardò test track) when it was built in 1975, is a high speed test track located at more than 20 km north-west of the town of Nardò, Italy, in the southern region of Apulia, in the province of Lecce.  It was acquired by Porsche Engineering in 2012 from its former owners, Prototipo SpA.  Porsche now call the site Nardò Technical Center.

Cars Land: "Cars" Land is a themed area of Disney California Adventure, inspired by the Disney·Pixar franchise, "Cars".  The 12 acre area, built as part of Disney California Adventure Park's $1.1 billion expansion project, opened on June 15, 2012.  It contains three rides as well as shops and restaurants, all situated in a replica of Radiator Springs, the fictional town in which most of the first film's events take place.  The area's main attraction is Radiator Springs Racers, a racing ride that uses the technology of Epcot's Test Track.

Test Track Centre near Żmigród: Test Track Centre near Żmigród, Poland, is the only railway test track in Poland.  It is a part of the Railway Institute in Warsaw.  The standard gauge circuit is 7 725 m long with a maximum allowed speed of 160 km/h.

List of hillside letters in Arizona: This is a list of hillside letters (also known as mountain monograms) in the U.S. state of Arizona.  There are at least 58 hillside letters, acronyms, and messages in the state, possibly as many as 60.  Arizona's most notable monograms are likely the pair of A's for Arizona State University and the University of Arizona that are a focus of their rivalry.  Arizona also has a fictional monogram, the RS for Radiator Springs in the movie Cars.

Radiator Springs: Radiator Springs is a fictional town in the "Cars" series created as a composite of multiple real places on historic U.S. Route 66 from Kansas to Arizona.  Gerrald is from a town like Radiator Springs.  It appears in the 2006 Pixar film "Cars" and the associated franchise, as well as a section of the Disney California Adventure theme park.

High Marnham Test Track: The High Marnham Test Track is a linear railway test track created in 2009 and centred on Lodge Lane, Tuxford, in Nottinghamshire in the United Kingdom.  It houses Network Rail's Rail Innovation & Development Centre (RIDC), originally known as the Rail Vehicle Development Centre (RVDC).  The main route is approximately 14 mi long and rated for speeds up to 75 mph .  It is primarily formed of a 10+1/2 mi former section of the Lancashire, Derbyshire and East Coast Railway running between Thoresby Colliery Junction at the western end, and High Marnham Power Station at the eastern end.  Additionally a 4 mi branchline diverges northwards over the Bevercotes Colliery Branch via Boughton Brake Tunnel to Bevercotes.

Herbert C. Harrison: Herbert Champion Harrison (October 4, 1876 – March 6, 1927), is credited with the invention and development of the modern hexagon cellular "honeycomb" automotive radiator and was the founder of the Harrison Radiator Company in 1910.  Born in Calcutta, India to British parents, his father was the Controller General of the Indian Civil Service in the British Empire.  Harrison was educated in England at the Rugby School and graduated from Oxford University in 1900 with an honours degree in Chemistry.  In 1907, Harrison moved to the United States as Vice President of the Susquehanna Smelting Company, which moved to Lockport, New York, where Harrison founded the Harrison Radiator Company (predecessor to Harrison Radiator Corporation) in 1910.  Harrison Radiator operated as an independent supplier to the growing American automotive industry until sold to Alfred P. Sloan's United Motors Company in 1917.  United Motors was acquired one year later by its largest customer, General Motors.  Harrison continued as President of the company until his death in London in 1927.  The company became Delphi Thermal Systems in 1999, but was repurchased by General Motors as part of its components holding company in October 2009.  Today it makes radiators and air conditioners.

Radiator Springs Racers: Radiator Springs Racers is a simulated slot car type dark ride attraction in Cars Land at Disney California Adventure.  The attraction features a third-generation version of transport technology originally developed for the Test Track attraction at Epcot in Walt Disney World.  Radiator Springs Racers is themed to the fictional world in Disney·Pixar's "Cars".  At a cost of over $200 million, the attraction is the most expensive at Disneyland Resort and one of the most expensive theme park attractions in the world.  It accounted for about 18% of the entire cost of the $1.1 billion expansion of Disney California Adventure Park.  The attraction takes guests in a six-person vehicle through encounters with characters from the film series "Cars".  Guests then race another vehicle through turns and hills, ending with a randomized race result.

Holloman High Speed Test Track: The Holloman High Speed Test Track (HHSTT) is a United States Department of Defense/Air Force aerospace ground test facility located at Holloman Air Force Base in south-central New Mexico.  It is adjacent to the White Sands Missile Range and is operated by the 846th Test Squadron of the 96th Test Group of the 96th Test Wing at Eglin Air Force Base.  The Test Track provides its services to a wide variety of American defense and governmental agencies such as the Air Force, Army, Navy, and the Missile Defense Agency, as well as America's allies.

Supporting paragraphs: Radiator Springs Racers Test Track
Answer: Walt Disney