Positive: Factories had an assembly line and many different people had different tasks, and it made producing a lot easier and faster.
Negative: Working in factories was not something people wanted to do, because it was unsafe and unhealthy.
Hope this helps :)
The answer for this would be b
Answer:
Because the U.S. learned that the Germans were trying to ally Mexico and German submarines began to attack American submaries.
Explanation:
see answer.
