What is in common with Mongols, White Huns, and the Mughals as well was that all of them were persecuting Buddhists along their conquests on either Europe or Asiatic soil. None of the mentioned civilizations were particularly fond of the buddhistic teachings.
Hello! The answer is C- Albert Einstein
European power of France, Britain, Belgium and Netherlands were keen to take advantage of Africa's abundant natural resources including Gold, Silver, Minerals and even Slave labor.
Similarly, the Japanese knew they lived in a small piece of land which was resource-poor and isolated from the rest of the world.
By expanding and colonizing Asian countries, they wanted to take advantage of local resources which including abundant food and millions of people as slaves.