TASK DEFINITION: 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.
PROBLEM: Category: U.S. HISTORY 
Clue: The Cajuns migrated to Louisiana from there

SOLUTION: nova scotia

PROBLEM: Category: MONEY & FINANCE 
Clue: When stocks are in an upward trend, it's a bull market; as they drop, it's called this

SOLUTION: bear market

PROBLEM: Category: 5-LETTER WORDS 
Clue: To reduce 137,618 to 68,809

SOLUTION:
halve