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: DEMOGRAPHICS 
Clue: In 2005 the World Health Organization appropriately decided to stop hiring people who do this
[A]: smoke


[Q]: Category: EXPLORERS 
Clue: On hearing of the discovery of George Mallory's body, this man told reporters he still thinks he was first
[A]: sir edmund hillary


[Q]: Category: LAW ENFORCEMENT 
Clue: This police force developed from bands of Indian fighters who protected American settlers in Mexico
[A]:
the texas rangers