Which of the following beer styles developed in America?

The Double IPA is a beer style that indeed developed in America, particularly as a product of the craft brewing movement that surged in the late 20th century. This style is characterized by its higher alcohol content and intense hoppy flavor, which reflects the trends of innovation and experimentation among American craft brewers.

American brewers were inspired by traditional IPA styles, but they sought to create something more robust and hop-forward. This led to the creation of the Double IPA (or Imperial IPA), which typically has an alcohol content ranging from 7.5% to 10% or higher and a pronounced bitterness and aromatic profile stemming from generous hop additions.

In contrast, styles like Best Bitter and Oatmeal Stout have their roots in the UK and are closely associated with British brewing traditions. Saison is a Belgian style originating from the Wallonia region of Belgium, known for its farmhouse characteristics. Although American brewers have certainly adopted and adapted these styles, they were not originally developed in the United States like the Double IPA.