The scale does. When you know the scale it is easy to calculate the real distance. If the scale is 1 : 1000, that means that 1cm on the map is equal to 1000cm in real life.
The President is the part of government that represents the nation and sets policy. The correct answer is B.
He called them literally "Herrenrasse" in German, which can be translated to "master race", or "race of the lords", and was understood as a race superior to others