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!! :)
I think it's D. Hindu- Arabic Numerals
Answer:
Hi, There!
The correct answer is D) establishment of restrictive immigration quotas
xXxAnimexXx
Have a great day!
The answer is The Great Wall
