Answer: (A.) He was an immigrant from Denmark. and (D.) He wanted to make people aware of the changes immigrants faced.
Explanation:
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Some of the reasons that global migrations occurred in the 1750-1900 time period were forced labor, poverty,hope for jobs, work-related things, and for safety.
Answer:
The beginning of the Precambrian period starts with the formation of Earth about 4.5 billion years ago and ends at the first sign of complex life about 540 million years ago. Though the Precambrian Period is often referred to as a period, it's actually the only supereon, which means that it spans multiple eons.
Explanation:
D. more then 80% americans
