I wanna say it's D but I'm not sure.
Answer:
The Stone Age was a broad prehistoric period during which stone was widely used to make tools with an edge, a point, or a percussion surface. The period lasted for roughly 3.4 million years,[1] and ended between 4,000 BCE and 2,000 BCE,[citation needed] with the advent of metalworking.
C) In a unitary system, the central government has more power than in a federal system.
If you are going to ask multiple choice questions, label them.
Answer: Immigrants suspected of being communists and/or anarchists.
Explanation:
The Palmer Raids is a 1919 event initiated by President Woodward Wilson. These actions were directed against immigrants from Italy and much of Eastern Europe for fear that they might proclaim the ideas of communism in the country. About 3,000 people were arrested in those raids, and more than 500 people were expelled from the country.