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.
Answer:
From the Louisiana Purchase
Explanation:
Here was no profit in it for most northerners and it would provide a way for wage slaves to find opportunities somewhere besides in the north.
They wanted cheap labor and the west would slim the pickings provided by desparation and poverty .
The system of laws was called apartheid.