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.
--------
Question: Category: FLAGS OF THE WORLD 
Clue: "L'Unifolié" is one of the names popularly given to the new flag unveiled in 1965 by this country

Answer: canada


Question: Category: THEATRICAL TERMS 
Clue: Partly from Greek for "song", they began as plays with music, then acquired sensational plots

Answer: melodramas


Question: Category: -ISMS 
Clue: This term for an economic system first appeared in English in Thackeray's "The Newcomes", about the rise of a family

Answer:
capitalism