Answer:
1. primary source materials.
2. historiography
Explanation:
European countries use trade to gain wealth
The stronger countries in Europe in the 1400s and 1500s - England, Spain, France and Portugal.
<span>The Gulf Coast has a lot of "oil deposits" which has developed into an important industry in the South, since this is where a great amount of oil is shipped from ports such as those in Louisiana. </span>
I am not completely sure but would it be answer number 4? Sorry if I am wrong, it just makes more since to me.
