The route from Regensburg in modern Germany to Constantinople was followed during several Crusades. What geographical factor accounts for the popularity of this particular route?
A)The route followed a large and major river.
B)The route went through several populated areas.
C)The route avoided the rocky Mediterranean coast.
D)The route followed flat land useful for soldiers.

The correct answer is D. The route followed flat terrain useful to soldiers.

Explanation

According to the map, it can be seen that the armies of the crusades from the city of Regensburg (Germany) used a large part of the course of the Danube River located in central Europe to travel to Constantinople. This river was born in Germany and flows through countries such as Austria, Slovakia, Gungría, Croatia, Serbia, Romania, Bulgaria, Moldova, and Ukraine, between the mountain ranges of the Dinaric Alps and the Carpathian Mountains until it empties into the Black Sea. According to the map, you can see that the crusade from Germany, once it reached the mouth of the Black Sea, headed south to go to the city of Constantinople. According to the above, the correct answer is D. The route followed a flat terrain useful for soldiers.

the foundation of greek city-states: following the fall of the mycenaean civilization in the 10th century bc, the area surrounding the empire went through its own mini dark ages. answer and explanation

answer is :

many churches split during the movement.

new religions grew in popularity.