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: ON THE COAST 
Clue: A 19th c. "Committee of Vigilance" fought the crime that gave part of San Francisco this North Africa-inspired nickname

A: the barbary coast
****
Q: Category: HISTORIC AMOURS 
Clue: He may have sired several of Lady Castlemaine's children; no wonder he was "The Merry Monarch"

A: charles ii
****
Q: Category: FRENCH HISTORY 
Clue: Reigning from 1715 to 1774, he was the successor & great-grandson of the "Sun King"

A:
louis xv
****