Which of the following beers is an example of an American IPA?

The selection of New Belgium Ranger as an example of an American IPA is accurate because it fits the specific characteristics typically associated with this style. American IPAs are known for their well-defined hop bitterness and fruity or floral hop aromas, which often feature varieties like Cascade, Centennial, and Citra. New Belgium Ranger embodies these traits with a pronounced citrus and pine hop profile, along with a balanced malt backbone that supports the hop character.

In contrast, the other options do not fit the American IPA category. Dieu de Ciel Peche Mortel is a strong stout with a focus on coffee and chocolate flavors. Mikkeller Beer Geek Brunch Weasel is a unique imperial stout brewed with coffee, thus also not aligned with the IPA style. Brooklyn Brown Ale is characterized by its malt-forward profile with nutty and caramel notes, distinctly leaning away from the hoppy and bitter nature of an American IPA.