What was Genghis Khan’s policy about other religions in the Mongol Empire? He required other religions to view him as a god.
He allowed followers of other religions to worship freely.
He adopted the religion of conquered peoples as his own.
He forced everyone throughout the empire to accept Mongol religion.

yes

explanation:

no every country is held to the same degree as others just some member countries such as the usa and germany are more economically sound so the need to show there support to all others  

warfare was the primary means of cultural transmission in both regions.

geography

this is because warmer climates often don't get people sick from the flu and regions where it was often colder more people received the flu. hope this if you need more reasoning i am here to