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.
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Question: Category: "MEN" AT WORK 
Clue: This journalist said no one "has ever lost money by underestimating the intelligence of the great masses"

Answer: mencken


Question: Category: THE KING IS DEAD 
Clue: On Sept. 9, 1087 this Norman stopped stormin' after being thrown from his horse at the Battle of Mantes

Answer: william the conqueror


Question: Category: WHAT THE "H"? 
Clue: Olympic event won twice by Jackie Joyner-Kersee

Answer:
the heptathlon