I want to know the answer to the following question:
What is the name of the movement of rural blacks in the early 20th century called?
All the background I'm provided with is that "Detroit, like many places in the United States, developed racial conflict and discrimination in the 20th century following rapid demographic changes as hundreds of thousands of new workers were attracted to the industrial city; in a short period it became the 4th-largest city in the nation.". Is that enough to answer the question?
Answer: no