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: ANCIENT GREEKS 
Clue: This actor of the 6th century B.C. is credited with introducing the use of masks on stage

A: thespis
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Q: Category: THE BUSINESS WORLD 
Clue: Because many of these have happened to GE stock, 1 share bought in 1892 would be 1,536 today

A: stock splits
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Q: Category: ON THE ROCKS 
Clue: While limonite adds a yellowish tinge to marble, hematite adds this color

A:
red
****