The correct answer is D) War drove many refugees from their homes.
In 1840, many German people moved to the United States because war drove many refugees from their homes.
Statistics indicate that German immigration to the United States grew from 1830 to 1870 because the war and they were looking for a better place to live. In that period, almost 7 million people arrive at states such as New York and Pennsylvania. Many Germans that arrive at the United States were farmers looking for new and better lands to farm.
