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: CABINET OFFICERS
Clue: He was the last Secretary of State to serve in the post under 2 presidents
henry kissinger

Category: IRISH-BORN AUTHORS
Clue: Once a drama critic in his native Dublin, he toured the U.S. as an actor's manager, but never visited Romania
bram stoker

Category: COMMUNICATION
Clue: A government website says it's "a complete, complex language... said to be the 4th most commonly used" in the U.S.
american sign language