You will be given a trivia clue, and the category it belongs to. You should answer with the best answer that belongs in the category and is described by the clue. For consistency, answers should be in all lower cased letters.

Category: ENGINEERING 
Clue: The motto of this 1904-1914 engineering project was "The land divided, the world united"
the panama canal

Category: A PARIS CHRONOLOGY 
Clue: Paris was founded around 250 B.C. by the Celtic Parisii tribe, who built a settlement on an island in this river
the seine

Category: LET'S GET DOWN TO BUSINESS 
Clue: Here's the "scoop":  this chain began operating in 1978 out of a renovated gas station in Vermont

ben & jerry\'s