what is a city state?how did the geography (landscape)of Greece make it hard to settle the land so they developed city states?

City States are simple - Cities that are their own state

Explanation:

City States were usually like their own little colony. Greece was not fully united and these City States had their own government and everything. They were almost always at war with each others because the wanted more power and with the lack of a real government behind greece, there was much to be taken. The geography of greece made these City States even more valuable  because there were not many great places that had the resources or these city states.

even though you have attached neither the chart nor the generalizations, i have located them online. the right answer is d, since they are asking you about a generalization. you can only infer from the chart that between 2008 and 2009 the number of employed workers decreased significantly (from over 115 millions to 107 millions approximately), which signals some type of economic crisis.  

answer; make a no-nonsense accusation of the other;