Answer:
The Population of the state
Explanation:
A. Great Migration
100% sure, took the test earlier in the year
The answer is the second option, pyramids, because if you look at some of the most famous Mayan and Egyptian architectual works, you will see that they both have pyramids, they both might look different, but are used by both.
it allowed them to place a roof on large buildings
I believe 3 is the answer, because I think the U.S bought a part of Mexico.