Trench warfare ultimately hindered the progress of the war because it drew it to his stand still because neither side could advance.
The Church ran the majority of education during that time. Monks and priests served as teachers and scientists, leading discovery and education, but always under the watchful eye of the Vatican.
woman began to work and get jobs (something they had never been able to do before) and woman rights started to be a thing
C and A I believe I am not 100
A whole country or the world