C. Stock is indeed traded on respected markets (ex; NY stock exchange) but is regulated by the governing body of that countries stock market (in my case the U.S. Gov regulates the Stock exchange in the U.S.).<span />
The modern development of today's world would have first made the routes safer. Today we have the safety of common things such as police officers, hospitals, e.t.c. Transportation of goods would have been easier, and it would have been easier to carry larger amounts of goods at one time.
hope this helps :)
Ming Emperor Hongwu (Ju Yuanzhang) became emperor after the mongols were driven out of China.
Hope this helps! :D