It's either (the mechanical harvester) or (the internal combustion engine)
Hope that helped!
Answer:
The answer is A) to stop the spread of Communism from the USSR
Explanation:
Was one of the first acts in American History that began to limit immigration, showed how Americans were beginning to shift away from the "mixing pot" mentality and moved towards isolationist attitudes and a feeling of superiority over the less wealthy nations of the world. This attitude has continued today and immigration is still a big issue.
do you have answer choices?