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: ANNIVERSARY GIFTS 
Clue: In one form or another you can fork over this metal on the 5th or 25th anniversary
silver

Category: GERMAN LITERATURE 
Clue: During World War I he fought on the Western Front & was wounded several times; he later wrote a 1929 novel about it
erich maria remarque

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

george w. bush