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.

Category: THE 19th CENTURY 
Clue: In August 1807 this steamboat made the NYC to Albany round trip on the Hudson in 62 hours
clermont

Category: AT THE DRUGSTORE 
Clue: Breathe easier during a cold with Vicks' Cool Mist Ultrasonic one of these; it's "whisper quiet"
humidifier

Category: C PLUS 
Clue: C plus a cry of pain equals this, a sofa

couch