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: AMERICAN MOUNTAINS 
Clue: Of the more than 80 U.S. peaks over 14,000' that have names, most are in this state
colorado

Category: 1998 BESTSELLERS 
Clue: 35 years after her death, she's the subject of a new collection of poems by her husband
sylvia plath

Category: U.S. RETAILING 
Clue: A February 1998 study found the world's highest store rents, $580 per square foot, on this street

fifth avenue

