Why do you think christianity spread more rapidly in the cities than in the countryside?

This is what i know about that 

well it make's sense because like your in city and you will see people and maybe even hear them talk about there church then you get invited, and you go!

countryside is an issue well they don't have much around them and even if there were a church there arnt going to be much people.

Also they don't have those people to have a conversation just hope you have signal i would say 

Now i think they should keep it like this because people want there peace ans quite but what about church ? there not forced to believe in god  
but god await's for you!