The answer is B, movie. "Action" is used as an adjective here, so it cannot be an object when there is no noun present. "Saw" is a verb. "I" is the subject, so the only remaining option is B, movie. The question to easily determine what the object is would be "What did you see?" And the answer would be "A movie".
Answer:
I would rather be violet,she got to go home tall and blue,my least is Augustus, he went home all stinky and full of chocolate. I wouldn't like that to happen to me.