The answer to this question is "Civil rights and feminism"
The Supreme Court's decision in Brown v. Board of Education of Topeka ruled that D) segregated schools were inherently separate and unequal. The decision ruled that segregation policies in the South violated the Equal Protection Clause of the constitution and were therefore unconstitutional.
<u>Answer</u>:
The common thing between these three types of activities is that they form a production chain giving customers the provision of finished goods or services.
Primary production involves acquirement of raw materials for production like coal, metal, rubber tapping etc.
Secondary production involves manufacturing and assembly process that involves the use of such raw materials.
Tertiary production involves commercial services that support the production and distribution process.
All the processes occur in line with each other, where the working of one is essential for the other.
Rightness. the answer is rightness<span />
Slavery helped out the class structure in the South by helping people become more dependent and more supportive of what they need.