Actually, yes, it happens everywhere. most of the time some people believe in their own beliefs and get too hard headed and shallow to even process that not everyone has the same beliefs/practices that doesn't mean they're right nor wrong just different. like Atheism & Christianity; its a huge topic people discuss that usually always turns heated.
Answer: He was an explorer
Explanation: Christopher Columbus was an Italian explorer who was commissioned by the monarchs of Spain to find a new route to India.
C - They had a rivalry during that time
"C. was overthrown by invading Mongol tribes in A.D. 1279" would be the best phrase describing China's Song Dynasty, but this was of course not always the case.