The answer is" Assembly lines were highly efficient.....
A) a system where people elect, by majority vote, someone to make decisions in the best interest of the people
I think the answer to this is D.
No gallery was provided, but anyways -
Those extermination camps were in close proximity to railway systems and ghettos (enclosed community of Jews). For the goal to be fulfilled, the Nazis had to put the Jews in these ghettos, so, they could later transport them (via train) to the camps.
