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 consistency, answers should be in all lower cased letters.

Q: Category: "Y"? 
Clue: You can split the atom or even do barrel rolls using this toy

A: a yo-yo
****
Q: Category: LESSER-KNOWN AMERICANS 
Clue: A. Philip Randolph, who first proposed a march on this city in 1941, also helped organize the one in 1963

A: washington, d.c.
****
Q: Category: STOCK SYMBOLS 
Clue: This company's symbol is MMM; don't overthink it

A:
3m
****