Good climate, many rivers, fertile soil
D. Because their bring up a whole new level of what it looks like how big is it who eats their whose the owner what are the workers like.
The family is not very strong at promoting nationalism: for once, there can be family members of other nationalities, which would promote multinationalism! so we can reject a) and c)
now, military and state religion are both found in the other options and we have to choose between school and athletics - and school is more effective! so the correct answer is D.