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 simplicity, answers should be in all lower cased letters.
question:
Category: ADD A LETTER 
Clue: Confer if you wish, but if you add a letter to "confer", it becomes this type of evergreen
answer:
conifer


question:
Category: WHERE YA FROM, SENATOR? 
Clue: Edwards & Dole
answer:
north carolina


question:
Category: PICTURES AT AN EXHIBITION 
Clue: His 1960s works include "I Know How You Must Feel, Brad!" & "As I Opened Fire..."
answer:

roy lichtenstein