Frederick is giving a speech about legal decisions that were important in the U. S. civil rights movement. First, he plans to talk about Plessy v. Ferguson Supreme Court decision in 1896 that required racial segregation in public facilities. Second, he plans to talk about the Brown v. Board of Education Supreme Court decision in 1954 that declared that separate public schools for black and white students were unconstitutional. Finally, he plans to talk about the Civil Rights Act of 1968, which provided for equal housing opportunities regardless of race, creed, or national origin. Which pattern of organization is Frederick using?