Answer:
The correct answer is - d. urbanization
Step-by-step explanation:
Detroit's population increased dramatically between 1910 and 1930. Industrial growth leads to the development of the city. Development and the industries were a magnet for migrants as they see more opportunities in jobs and businesses.
The city of Detroit gets overpopulated as the migrants come from all over the country especially the south. This is rapid growth is called the urbanization process.