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.

Category: THE ROARING '20s 
Clue: The American Chronicle says that in 1924 half a million people wrote this Michigander asking for money
henry ford

Category: STAND BY YOUR MANNEQUIN 
Clue: In a magazine called The Show Window, this Oz creator dispensed advice on mannequins & creative display
l. frank baum

Category: AS "IF"! 
Clue: It's the only U.S. state that fits the category

california