Which statements describe why independent city-states developed in ancient greece?
choose all answers that are correct.
a.
greeks valued the sense that they were united into one nation.
b.
the rivers were navigable and allowed for travel and communication.
c.
travel across the seas was often difficult and limited trade and communication.
d.
living in the mountains kept groups of people separated from each other and made travel difficult.

china unilaterally claims the entire south china sea as sovereign territory, then builds artificial islands to bolster its claim. it suddenly activates an air defense identification zone over the east china sea, and threatens to down any aircraft that does not report its position. it builds roads into indian territory, then redraws the maps to show that it is actually chinese territory. the people's republic under president xi jinping is quickly becoming the bully of asia.

honestly you should get that checked out because it really isn't normal