The answer should either be Sanction or Embargo.
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.
B. The actual number of farmers increased between 1840 and 1900.
Very smooth surfaces such as glass mirrors and polished metals
