Looking for patterns is the one that makes more sense
Christianity appealed to many people because It embraced all people. It gave hope to the powerless people eternal life, this meant that those who are suffering in this life have a better chance for a better life. People were repelled by the roman extravagance and believed it to be a sin. Hope this helps! :D
(3) imperialism
stronger countries felt that they should take over smaller/weaker countries under social darwinism
hope this helps! :-)
Odometer, basis of geometry, water mill