What was an effect of the growth of the service industry in the late 1800s? A) the number of people who worked in factories decreased B) the number of people who worked in factories increased C) the urban middle class grew D) the urban middle class shrunk

C) The urban middle class grew.

the answer would be option c. the chief result of u.s. participation in world war i is that, the u.s. forces ended the stalemate and led to an allied victory. after the us joined wwi, the allies had the forces they need to triumph. hope this is the answer that you are looking for.

explanation:

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