TASK DEFINITION: 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.
PROBLEM: Category: PRESIDENTS 
Clue: Though only 5'7", this founding father was called "The Colossus of Independence"

SOLUTION: john adams

PROBLEM: Category: SOCK IT TO ME! 
Clue: It's the useful meteorological instrument seen here:

SOLUTION: windsock

PROBLEM: Category: THE DISAPPOINTING 21st CENTURY 
Clue: Type of city we don't live in, or type of stadium replaced by retractable-roof ones in Houston & Indianapolis

SOLUTION:
domed