Large cities have predominantly populations, while are more numerous in rural and suburban areas.

Large cities have predominantly 1,000,000 inhabitant populations, while primate cities are more numerous in rural and suburban areas. While primate cities has 200,000 inhabitants. It is atleast twice larger than the next smaller city. 

The answer is the third one or c

In financial aspects, a depression is a sustained, long haul downturn in monetary movement in one or more economies. it is a more extreme monetary downturn than a recession, which is a slowdown in financial action through the span of a typical business cycle. a depression is an irregular and extreme type of recession. so depression is always followed by recession but it is not correct to state that a depression always follow a recession.