Which conclusion is best supported by the information on the timeline?

Assuming that this is referring to the same timeline that was posted before with this question, the correct response would be that the development of agriculture led to increases in productivity and civilizations, since the major civilizations of the world all come after this time period. 

Economic success prussia had a very strong economy, partly due to the success of the zollverein. stronger prussian army king wilhelm wanted to build a bigger, stronger army but was blocked by the prussian landtag (parliament).-credits to google for putting answer -credits to slideshare for making answer-credits to me for putting answer on brain.ly