It was the Bantu tribe that migrated across Africa, bringing iron technology with it. Although it should be noted that this was a very gradual process and faced many hurdles.
A...Workers were at risk of having their jobs replaced by machines
Answer:The U.S. Supreme Court case Marbury v. Madison (1803) established the principle of judicial review—the power of the federal courts to declare legislative and executive acts unconstitutional. The unanimous opinion was written by Chief Justice John Marshall.
Explanation:
Mostly because it causes problems for the economy, like jobs being taken, the government having to pay them despite them not coming here legally. Those kinds of things.
