How were the Nazis able to spread their beliefs and actions to other countries?

By taking control over them
The nazis were supported because people were afraid of them.
Then as soon as the Nazis had enough power/control over them,
the Nazis took over the countries and created their concentration camps.
Created to what’s now known as the Holocaust.
People remained afraid of them,
so they did as they were told by the Nazis.

Also, Hitler decided to take out all of his hat towards the Jews.
Blaming them for all of his problems.
He had promised Germany that he would take away all of their debts that they owed from ww1 or ww11 I don’t remember exactly what world war it was. Ever since he made that promise to them, people have put more trust in him. So since he hated the innocent Jews, the people hated the Jews too.
They had no one else to blame so they blamed the Jews.
So the Nazis beliefs and actions were spread all thanks to Hitler and their actions.

-sorry it was so long but I hope that helped ☺️

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Ithink its c) the conditions in the factory have never been questioned by the employee.