Russian society is a bit more mature I guess or formal and they take care of many things such as friendship, and when they meet someone new they believe they are a stranger and do not feel safe. On the other hand in the Us society it is very happy and joyful where you have usual discussions, debates, conversations with friends, family and random people some times so that is what the difference is between the two.
The answer is C) Theme
It is the overall idea. The main point of the story. The theme is the particular setting.
~Deceptiøn
