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: A TRIP TO MARS 
Clue: Arnold arduously activates an ancient atmosphere appliance in this 1990 Martian big screen adventure
total recall

Category: SCIENCE & NATURE 
Clue: Developed by astronomer A.E. Douglass, dendrochronology determines age in this way
counting tree rings

Category: VARIETY PACK 
Clue: This 3-word phrase describes a desperate "leap" taken by a TV show to retain ratings

jump the shark