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.

[Q]: Category: DOUBLE TALK 
Clue: In the 1920s Donald Duncan introduced this child's toy to America & it's had its ups & downs ever since
[A]: yo-yo


[Q]: Category: RIVERS 
Clue: The mouth of this 2315-mile-long river lies in the Mississippi River 17 miles above St. Louis
[A]: the missouri


[Q]: Category: U.S. GOVERNMENT 
Clue: This cabinet department administers the Food Stamp program
[A]:
the usda