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: AFRICA 
Clue: Its Declaration of Independence was signed in 1847 by 11 men in that nation's Providence Baptist Church
liberia

Category: POP MUSIC 
Clue: Elvis Presley record which held Billboard #1 singles position for 11 weeks, longest in rock era
\"hound dog\"/\"don\'t be cruel\"

Category: COUNTRIES OF THE WORLD 
Clue: On July 1, 1997 its population suddenly increased by over 6 million

china