B. Hitler
He was the leader of Nazi Germany. He thought the German race above all other races.
Answer: We study other star systems in spaceships and big, professional telescopes
The correct option is C.
Plate tectonic theory explains the structure of the earth's crust and the many phenomena that are associated with it. This theory enables the scientists to know that there are movements in the interior of the earth which are responsible for volcanic eruptions and earthquakes.
Develop renewable resources, improve agricultural methods, improve fuel efficiency, and reduce petroleum use
The nucleus if a cell
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