Answer:
где цифры, если вы не возражаете, я прошу
Explanation:
It is either Railways or Trade ports but Im leaning more towards to D. Can I have a Brainliest.
I'm not sure 100% what exactly this question is asking, but I know World War 1 was the first war to include Gas masks and Chemical warfare, so that is more than likely the answer.
After 450 years as a republic, Rome became an empire in the wake of Julius Caesar's rise and fall in the first century B.C.