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.

Category: NAME THE PLAYWRIGHT 
Clue: "The Sisters Rosensweig"
wendy wasserstein

Category: HOMOPHONES 
Clue: A caustic substance in soap, or an untruth
lye/lie

Category: NATIONAL MONUMENTS 
Clue: George Custer's men are buried in a cemetery in the national monument named for this river

little bighorn