To my knowledge, the correct answer among all of the given choices is C.) Steam. If I'm not mistaken, this was the time that more trains came into use.
I hope this is the answer you were looking for and that it helps!! :)
It would be the last choice. <span>They are stored for later use.</span>
Technically there are 5 separate oceans but I think they would want you to say it's true.
Answer:
wealthy countries took over poor ones
