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: FRENCH 
Clue: Un cheval is a horse; cheveux is this, as on one's tete

A: hair
****
Q: Category: U.S. RIVERS 
Clue: The Falls of Saint Anthony stop this mighty river from being navigable north of St. Paul, Minnesota

A: the mississippi
****
Q: Category: PRESIDENTS SINCE 1970 
Clue: Once a union president

A:
ronald reagan
****