What is the difference between marginal districts and safe districts?

How can changes in technology or consumer demand make it difficult for people to get jobs? by changing the number or kind of jobs available by making it possible for some people to work fewer hours by making it difficult for people to buy what they want by creating a demand for things that are not available

The term "jim crow" is used to describe which of these? a) bans on hunting b) segregation of the races c) preventing women from voting d) creating more public schools

Segregation or discriminatory practices that occur even when there is no explicit legal enforcement