The answer is C. Great migration
The answer is nationalism. Both leaders wanted to free their
countries from the foreign rul. They had gathered all their supporters in order
to unify them under King and stage an uprising. Both leaders became successful and
were able to regain sovereignty in their respective countries
They made American goods cheaper than imported goods.
Even though the map wasn't provided, it is possible to answer the question by saying that the correct alternative is letter<em> A: Nazi leaders wanted to keep the existence of extermination camps secret.</em>
The extermination camps were built to murder sistematically jewish, communist and all other kinds of people that the Nazi considered inferior. The idea was to have them in hidden places so as not to cause commotion.