Context: I know I topped it off to where I can see it when I got done with project . The main cause of this head job was to replace the blown headgasket . It was n't totally blown , but it was on its way to going . It was blowing blue smoke on startup .

Question: What might have I topped off in this project ?
Options:
0. I might have topped off some kind of gear in the car .
1. I might have topped off some kind of fluid in the car .
2. I might have topped off some kind of wheel in the car .
3. None of the above choices .
Answer: 1