Question: Which member of the Volkswagen Group did Tommy Kristoffersson drove for?

Context paragraphs:
Audi A3: The Audi A3 is a Small Family/Compact car produced since 1996.  The first two generations of A3 were based on the Volkswagen Group A platform, which they share with several other models such as the Audi TT, Volkswagen Golf, Volkswagen Caddy, and Volkswagen Touran, as well as SEAT León, SEAT Toledo, and Škoda Octavia.  The third-generation A3 uses the Volkswagen Group MQB platform.

Tommy Kristoffersson: Tommy Sten Kristoffersson, actually Tommy Sten Kristoffersen, (born 1 May 1959 in Arvika) is a Swedish race car driver whose father hails from Denmark.  In the beginning of his career he competed in rallycross for Audi before starting a team in the Swedish Touring Car Championship (STCC) in 1998 running Audi A4 Quattros with himself as one of the drivers.  Tommy Kristoffersson has competed for his team from 1998 to 2008, finishing 4th overall in 1998 and 2001.  He retired from the STCC before the start of the 2009 season, as Kristoffersson Motorsport was struggling in the championship three years after Audi pulled out from backing his team.

Volkswagen RX Sweden: Kristoffersson Motorsport is a Swedish auto racing team owned by racing driver Tommy Kristoffersson.  It currently competes in the FIA World Rallycross Championship and Swedish Touring Car Championship, with Tommy's son Johan Kristoffersson as one of the drivers.  The team has raced under several sponsored names, such as Team Biogas.se, Volkswagen Dealer Team KMS, Volkswagen Team Sweden, Volkswagen RX Sweden and PSRX Volkswagen World RX Team Sweden.

Audi: Audi AG (] ) is a German automobile manufacturer that designs, engineers, produces, markets and distributes luxury vehicles. Audi is a member of the Volkswagen Group and has its roots at Ingolstadt, Bavaria, Germany.  Audi-branded vehicles are produced in nine production facilities worldwide.

Volkswagen Group of America: Volkswagen Group of America, Inc. (sometimes referred to as Volkswagen of America, abbreviated to VWoA), is the North American operational headquarters, and subsidiary of the Volkswagen Group of automobile companies of Germany.  VWoA is responsible for five marques: Audi, Bentley, Bugatti, Lamborghini, and Volkswagen cars.  It also controls VW Credit, Inc. (or VCI), Volkswagen's financial services and credit operations.  The company is headquartered in unincorporated Fairfax County, Virginia, near Herndon.

VAG-COM: VCDS (an abbreviation for "VAG-COM Diagnostic System" and formerly known as VAG-COM) is a Microsoft Windows-based software package, developed and produced by Ross-Tech, LLC since May 2000.  It is primarily used for diagnostics and adjustments of Volkswagen Group motor vehicles, including Volkswagen Passenger Cars, Audi, SEAT, and Škoda automobiles, along with Volkswagen Commercial Vehicles.  The name "VAG-COM" derives from the acronym for Volkswagen AG (VAG), the former name of the Volkswagen Group.

List of Volkswagen Group factories: This list of Volkswagen Group factories details the current and former manufacturing facilities operated by the automotive concern Volkswagen Group, and its subsidiaries.  These include its mainstream marques of Volkswagen Passenger Cars, Audi, SEAT, Škoda and Volkswagen Commercial Vehicles, along with their premium marques of Ducati, Lamborghini, Bentley, and Bugatti, and also includes plants of their major controlling interest in the Swedish truck-maker Scania.

Johan Kristoffersson: Johan David Kristoffersson (actually Johan David Kristoffersen), born 6 December 1988, is a Swedish racecar driver with Danish roots.  He is the son of former racing driver and Kristoffersson Motorsport (KMS) team owner Tommy Kristoffersson.  He won the Superstars Series championship in 2012, the same year in which he claimed the Scandinavian Touring Car Championship and Porsche Carrera Cup Scandinavia titles, and he is the champion of the 2017 FIA World Rallycross Championship.

Turbocharged direct injection: Turbocharged direct injection or TDI is a design of turbodiesel engines featuring turbocharging and cylinder-direct fuel injection that was developed and produced by the Volkswagen Group (VW AG).  These TDI engines are widely used in all mainstream Volkswagen Group marques of passenger cars and light commercial vehicles made by the company (particularly those sold in Europe).  They are also used as marine engines in Volkswagen Marine and Volkswagen Industrial Motor applications.

Volkswagen Group MQB platform: The Volkswagen Group MQB platform is the company's strategy for shared modular construction of its transverse, front-engined, front-wheel drive (optional four-wheel drive) automobiles.  Volkswagen spent roughly $60bn developing this new platform and cars built upon it.  The platform underpins a wide range of cars from the supermini class to the full size SUV class.  MQB allows Volkswagen to assemble any of its cars based on this platform across all of its MQB ready factories.  This allows the Volkswagen group flexibility to shift production as needed between its different factories.  Beginning in 2012, Volkswagen Group marketed the strategy under the code name MQB, which stands for "Modularer Querbaukasten", translating from German to "Modular Transversal Toolkit" or "Modular Transverse Matrix".  MQB is one strategy within VW's overall MB (Modularer Baukasten or modular matrix) program which also includes the similar MLB strategy for vehicles with longitudinal engine orientation.

Supporting paragraphs: Tommy Kristoffersson Audi
Answer: Audi