After world war one what action did the international community take in response to the new weapons of warfare
a trench warfare was banned
b atomic warfare was banned
c chemical warfare was banned
d unrestricted submarine warfare was banned

The service industry in the united states grew in the late 1800s. what was one effect of that growth? the number of people with jobs in factories as unskilled workers decreased. the number of people with jobs in factories as unskilled workers increased. the middle class grew as people took jobs as clerks, lawyers, and teachers. the middle class shrank as people left jobs as clerks, lawyers, and teachers.