In a open primary everybody is allowed to vote and in a closed primary on registered people are allowed to vote. Think of it as a Sale at a store. for a closed sale only members are allowed to get the discounts, but in a open sale you get all of the discounts, even if you are not a member.
Answer:
Southern state legislatures had passed and maintained a series of discriminatory requirements and practices that had disenfranchised most of the millions of African Americans across the South throughout the 20th century
Explanation: