It promoted the (relatively) rapid diffusion of immigrants, language, and domesticated crops and animals. Those factors are examined in excellent detail in Jared Diamond's book, "Germ, Guns and Steel" which I highly recommend for anyone studying the development of world cultures. It's a long read, but well worth it.
Both B and D took place, but if you had to choose one, it would be B. The technological advances made farming much more quicker and easier for a large piece of land.
The answer is B, Thousands of troops and leaders were captured.
Because it didn’t receive support from the senate. Also the U.S wanted to keep America out of European affairs.
C. Avoid the problem of fighting Allied powers on two fronts; In more detail, the Schlieffen plan was the Imperial German plan to force a French surrender early in the case of a two front war with France and Russia. The plan stated that German troops should attack the French lowlands by marching through Belgium and advancing along the coast until the German units completed a pincer movement to the west of Paris, cutting off the main French force from their Capital. This was planned to be done in a few weeks, that way Germany could start an offensive against Russia before they could mobilize their army.