Answer:
A Industrialization System
I think the answer is C). Floor Consideration because the passage something about the floor being open. That's my reasoning. I f it is not the correct answer and you get the correct answer please let me know because i am taking a test with this question it and i don't know the answer. So, thank you and I hope I helped.
C. Terrorist attack on September12(2011)
Insuring domestic tranquility is simply meaning they are keeping the peace within the country, city, town, or state. Mainly to keep things like the civil war, ww1, ww2, and the cold war from happening again.
