Amajor factor in germany military victories from 1935-1940 was :

Blitzkreig or lightning war

Explanation:

Blitzkreig or lightning war, is the popular name that receives a military attack tactic that involves an initial bombardment, followed by the use of mobile forces attacking with speed and surprise to prevent an enemy from carrying out a coherent defense. The basic principles of this type of operation were developed in the twentieth century by several nations, and adapted years after the First World War, mainly by the Wehrmacht, to incorporate weapons and modern vehicles as a method to avoid trench warfare and the war on fixed fronts in future conflicts.

d

explanation:

i'm pretty sure the answer would be

c. england

hope this best of luck sorry if i'm wrong

~animaljamissofab ♥