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: TOUGH GEOGRAPHY 
Clue: Monte Cervino is the Italian name for this peak, located in the Alps & copied in Anaheim

SOLUTION: the matterhorn

PROBLEM: Category: "C" WORLD 
Clue: (Cheryl of the Clue Crew in Berlin)  The Nazis blamed the 1933 Reichstag fire on this political group that may well have set it themselves

SOLUTION: the communists

PROBLEM: Category: C'EST CHEESE! 
Clue: At the Congress of Vienna, in a contest instigated by Talleyrand, this French cheese won the title "Le Roi du Fromage"

SOLUTION:
brie