Answer:
because people would fight over land to grow crops and build houses etc.
Explanation:
B would be the right answer I believe
Answer:
In simple words, Unlike WWI, which was battled in trench with machine weapons as well as biological weapons, WWII was conducted with modern weapons and equipment, with more aircraft, warships, vehicles, and submarine. During the war, special operations techniques, as well as atomic weapons and covert communications, were created.