The answer is: c.The earliest third parties in the United States arose as a result of the Great Depression.
The great depression happen in 1920s, but the earliest third party has been around since the 1800s. Those third p[arty arise because there are a lot of segment in the population felt that their values/principles were not fully embodied by the existing two dominant parties. So, they decided to form third party alternative.
Industrial cities began to develop because of new technologies and ideas and in order for the factories to grow larger, they needed more workers so the the unemployed people had those opportunities to work there.
Its true
It will never bring development because you will never have an agreement. You need to have the same purpose so you can work together and have some progress. But it can also be wrong because what if you have two teams working on different projects? Your teams have a disagreement, but both are developing different solutions to the same problem. Still developing but with a different idea. It all depends on your perspective.
The answer is option B. Hope this helps!