Answer:
The 14th Amendment contained three major provisions: The Citizenship Clause granted citizenship to All persons born or naturalized in the United States. The Due Process Clause declared that states may not deny any person "life, liberty or property, without due process of law."
Explanation:
-people wanted to move because they wanted better lives. they faced dangerous journeys .
-they moved west because land was cheap or free and they thought they would do better business in the west .
-people who weren't making business or wasn't making any money, found the opportunities to move west to start everything all over again
Where answers B, C and D have inaccuracies in one or more parts, answer A is the only correct answer.
A - Because they are a direct link to the events in history
Primary sources are sources that came from that time of history from the same location, time period, and era. For instance, journals from World War II from a French Military leader. These are direct links to that time in history and are the most accurate sources that are presented.
B is incorrect as even without these sources there are other methods to know about history such as secondary sources.
C is incorrect as primary sources are not the only way - again, secondary sources are a thing.
D is incorrect as secondary sources are reliable and can be trusted, but they just aren't as important and well, direct as primary sources.
Hope this helps!