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.

[Q]: Category: 19th CENTURY BUSINESSMEN 
Clue: In 1873 he founded the J. Edgar Thomson works near Pittsburgh, naming the steel mill for the Penn. railroad president
[A]: carnegie


[Q]: Category: ABBR. 
Clue: Computer users should know that BBS stands for this
[A]: bulletin board system


[Q]: Category: "ARG"! 
Clue: Be a cheapskate and tell us this word that can precede "basement" or "counter"
[A]:
bargain