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: CORPORATE AMERICA 
Clue: Every year, this company delivers more than a billion packages, more than the Post Office

A: ups
****
Q: Category: "HARD" QUESTIONS 
Clue: Stubborn

A: hard-headed
****
Q: Category: ART & ARTISTS 
Clue: In 1481 Botticelli led a group of painters in frescoing this newly erected Vatican chapel

A:
the sistine chapel
****