Which statement correctly describes decaf coffee?

Decaf coffee is described as coffee with most of the caffeine removed. While it still undergoes a decaffeination process, it is important to note that it is not entirely caffeine-free. Most decaffeination methods can remove about 97% of the caffeine, meaning there can still be a small amount present. This clarifies why the correct description is that decaf coffee contains most of its caffeine removed, rather than being completely devoid of caffeine or entirely natural in its caffeine-free status.

Additionally, the other statements either imply inaccuracies, such as suggesting it is naturally caffeine-free, or make distinctions that do not apply universally to decaf coffee. For example, decaf coffee is brewed in a similar manner to regular coffee and does not have a universally mandated specific amount of caffeine it must contain.