The correct answer would be A because you need a comma in between the <em>A </em>and <em>S</em>
You already got the answers. I'm confused on what you want me to do.
I think it’s a because most of the time the main idea is in the first paragraph
Answer:
the first one. A train stopping to let get fuel and passengers
Explanation:
the biggest hint it gives is"and stop to feed itself at tanks" and what is the only thing that train eat it is gasoline
