Final answer:
Zima, a clear malt beverage by Coors, was discontinued in the United States in 2008, with the correct answer being C. 2008.
Step-by-step explanation:
Zima was a clear malt beverage produced by Coors Brewing Company, which is now a part of the Molson Coors Brewing Company. The correct answer to when they stopped making Zima is C. 2008. It was introduced in 1993 and marketed as an alternative to beer, but the popularity of Zima declined over the years. Following a number of attempts to revitalize the brand, Zima production in the United States was discontinued in October 2008. However, it briefly returned for limited releases in the summers of 2017 and 2018 as a seasonal product due to nostalgia and a trend in retro products.