The Chinese people invented the Seismometer during the Han dynasty to help predict natural disasters. The Seismometer measured the motion of the ground, and things included of seismic waves such as, earthquakes, volcanoes, and other things that involve explosions that are generated by seismic waves.
The correct answer is - C) had Jewish ancestors.
The Nuremberg Laws were defining a Jewish person by the person's ancestry. If someone had a Jewish ancestor and it was recorded in the documentations, than that persons was identified as Jewish, even though that person might have identified as other ethnicity, and was not practicing Judaism as its religion, it didn't matter.
The next step after the identification of the Jewish people was one of the biggest massacres in the world's history, known as the Holocaust, where it is estimated that around 6 million Jews were killed.
Many countries wanted to control over many economic activities in other countries as well as utilize other countries for cheap labor. In addition, some countries wanted to explore the world and conquer for their homeland while other countries thought that their own country and race was superior to all other countries and therefore believed it was needed that they invade other countries and educate them as well as some countries practicing imperialism to convert people to their religion.
Wealth and growth of army and strong leaders