instruction:
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 consistency, answers should be in all lower cased letters.
question:
Category: PHRASES OF DEATH 
Clue: Completing 2 tasks with one action is "killing 2" of these "with one stone"
answer:
birds


question:
Category: LESSER-KNOWN AMERICANS 
Clue: A. Philip Randolph, who first proposed a march on this city in 1941, also helped organize the one in 1963
answer:
washington, d.c.


question:
Category: LET'S BOUNCE 
Clue: Sound navigation& ranging is the full name for this device that bounces radio waves underwater
answer:

sonar