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 simplicity, answers should be in all lower cased letters.

Category: WHAT SHOULD I "DU"? 
Clue: A philosophical system that seeks to explain all phenomena in terms of 2 distinct principles
dualism

Category: AIRLINE AD SLOGANS 
Clue: "The world's favourite airline"
british airways

Category: LOUISIANA LORE 
Clue: Kenner, outside New Orleans, was once called "Cannes Brulee" as Indians used to light this on fire to drive out game

sugarcane