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: 10-LETTER WORDS 
Clue: From the Latin for "hand written", it's the original text of an autnor's work
manuscript

Category: MOVIE CO-STARS 
Clue: Meryl Streep & this actress were acclaimed for playing sisters in the 1996 film "Marvin's Room"
diane keaton

Category: ENDS IN "TH" 
Clue: This fish was thought to be extinct millions of years ago until one was found off South Africa in 1938

coelacanth