Answer:
D) The Jim Crow laws
Step-by-step explanation:
The Jim Crow Laws were formulated from the late 1800s to the early 1900s, and enforced until 1964, when they were struck down by the Civil Rights Act of the same year.
The Jim Crow Laws mandated racial segregation in public facilities including schools, parks, restaurants, trains and buses.
If you were an African American Person in the South and entered a bus, you had to seat in the African American designated area, which was usually on the back of the bus. If you were an African American kid, you would have to drink from the African American school fountain, and so on.