How did the US use of railroads affect the rest of the world? PLZ HELP ME I WILL GIVE BRAINLIEST

In addition to transporting western food crops and raw materials to East Coast markets and manufactured goods from East Coast cities to the West Coast, the railroad also facilitated international trade. The first freight train to travel eastward from California carried a load of Japanese tea.

Explanation:

the real answer is b

the conditions that made the byzantine empire vulnerable to attacks by the muslin turks were the sack of constantinople by western crusaders, the conquests of the sultanate of rum, presence of rival kingdoms and finally the set up of fiefdoms at the empire which were owned by the ghazis (turkish warriors).