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 consistency, answers should be in all lower cased letters.

[EX Q]: Category: GOING WIRELESS 
Clue: Thanks to firms like Pegaso & Telemex, this country now has more cellular users than fixed line customers
[EX A]: mexico

[EX Q]: Category: RANKS & TITLES 
Clue: Inheriting property & title from her deceased husband made Tz'u-hsi of China this kind of Empress
[EX A]: dowager

[EX Q]: Category: DEAL OR NO DEAL 
Clue: The USA said "Deal!" on April 30, 1803 when it agreed to pay France $15 million for this
[EX A]:
the louisiana purchase