PLEASE HELP I NEED THIS NOW!! What led to the construction and use of trenches in combat?

German successes required the French to defend their country differently.

the inability of the armies to build more permanent encampments

the need to create defined spaces between combatants

the inability of either side to make significant advances in Belgium and France largely due to new types of weapons

The letter explains the treatment of prisoners of war. of 3.6 million prisoners of war, only several hundred thousand are still able to work fully. a large part of them has starved, or died, because of the hazards of the weather. . the camp commanders have forbidden the civilian population to put food at the disposal of the prisoners, and they have rather let them starve to death. –letter to defendant wilhelm keitel from alfred rosenberg the letter prosecutors at the nuremberg trials prove that soviet prisoners were a) treated well despite the conditions. b) treated poorly. c) subject to execution. d) subject to crimes against peace.