TASK DEFINITION: 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.
PROBLEM: Category: BRIT LIT 
Clue: His 1915 novel "The Rainbow" was declared obscene; so was his 1928 novel

SOLUTION: d.h. lawrence

PROBLEM: Category: WHAT'S THE BIG IDEA? 
Clue: The 21st century doctrine named for this man allows the U.S. to wage preventive war if an attack on us is coming

SOLUTION: george w. bush

PROBLEM: Category: SCIENCE & NATURE 
Clue: It's the largest & most economically important family of conifers

SOLUTION:
pine