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.

Category: THE OTHER 2 LITTLE PIGS REBUILD 
Clue: They say "people who live in" these "houses shouldn't throw stones", but if it's 9 inches thick, Pig 1 says fire away!
glass houses

Category: SUPERHEROES 
Clue: For a while the Hulk was gray, but now he's this color
green

Category: THE NEW YORK TIMES BUSINESS 
Clue: The N.Y. Times questioned where the $123 billion the Federal Reserve loaned to this insurer actually went

a.i.g.