What did Belgium and French forces destroy that stopped German trains from riding into Paris? a. The Trenches
b. The Telegraph lines
c. The Engines
d. The Train tracks

D.

Explanation:

European armies' increasing reliance on railways culminated in one of the world's bloodiest wars. ... In Vienna, then Berlin, then Paris, similar telegraphs clattered. ... In all, nearly 200,000 troops and 55,000 horses rode the rails to the front. ... Unlike the German lines, four-fifths of the French rail network was double-tracked, ... HOPE YA GET IT! :D

u wouldn't it be D. the train tracks, because thats the only way trains can travel.

the factors that the economies of the muslim empires prosper were:

1- land trade routes-located between three continents  

2- sea trade routes

trade contributed to the spread of muslim empires, and with that islamic culture led to a growing feeling of internationalism resulted in the transfer of technology, science, and other cultural forms.