Answer:
I'll answer both below in the explanation
Step-by-step explanation:
1.) Germany decided to agree to an armistice with the Allies at the end of WWI because of their failed Spring Offensive. They were suffering from food shortages at home and they had lost a lot of troops. The French were on the offensive and taking no prisoners as they advanced on the German homeland. In order to stop the killing, Germany decided to agree to a truce.
2.) The primary innovations in weapons that affected the outcome of WWI were the machinegun and the tank. Before they were invented most of the fighting was done by the infantry. With the machinegun, more effective fighting could be had and the tank enabled each side to attack from further distances.
Hope this helps! Merry Christmas!