Like "Jeopardy!" this spot began with an answer: hops. Hops have been the engine driving craft beer for more than a decade, and without an India pale in the top four, it was time for an India pale ale. Dozens of IPAs have been influential, which made zeroing in on one a challenge. But I settled on this classic, and without much consternation. Back in 1999, when many American craft breweries were still built on mimicking European beer styles, Delaware's Dogfish Head changed how a nation thought about hops, with this boozy (9 percent alcohol), bitter (90 IBUs) and assertive imperial IPA. What made the beer even more important was the company's aggressive distribution strategy, which made Dogfish the nation's fastest-growing brewery by 2011 and put 90 Minute IPA in countless awestruck hands at a time that craft beer was building momentum toward the breakthrough that followed. (F&W: 23)