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: GODS & GODDESSES 
Clue: Augustus Caesar encouraged the worship of this god who was considered the avenger of Julius Caesar
mars

Category: MYSTERY NOVELS 
Clue: The first line of dialogue in this 1930 novel is spoken to secretary Effie Perine, "Yes, sweetheart?"
the maltese falcon

Category: WORLD LANDMARKS 
Clue: In the 1920s this nation's churches pooled their money & erected a 120-foot religious monument on a 2,300-foot peak

brazil