Carbon cycles through various reservoirs on Earth. The time it takes to form these reservoirs varies greatly. Which process in the carbon cycle takes millions of years to form the indicated reservoir?

The answer is b, as with an inference you make a statement with no evidence

It might. it might because if you think about if they discovered if we came from (lets say something funny like aliens) and thy found cells that matched and they would have t do more research about it but would most probably change their theory.