Answer:
Explanation:
In 1619, Africans began being imported as slaves. Immigrants sometimes paid the cost of transoceanic transportation by becoming indentured servants after their arrival in the New World. The United States experienced successive waves of immigration, particularly from Europe.
Your answer would be A: Radiation
If you wanna look more into it you can look up the Chernobyl disaster or other nuclear explosions.
Hope this helps :)
Bootlegging- making fake or false copy’s of something, or, making alcohol against the law. Depends about what type of history.
<span>"the 19th-century doctrine or belief that the expansion of the US throughout the American continents was both justified and inevitable."
They believe it is their right to expand westward!
Hope this helps! </span>