The correct answer is D.
The Supreme Court's decision in Plessy v. Ferguson was unconstitutional because it was not consistent with the 14th ammenment.
The 14th ammendment grants citizenship and equal civil and legal rights to African Americans and slaves who were emancipated after the American Civil War.
Segregation laws were explicitly againts the ammendment because they did not provide equal protection and liberties to non-whites. By forcing them to sit separated from white people, african-americans were being banned from fully excersing their rights.
I'm gonna go with a free textbook, cause it's free duh :))
The answer is B) They are always focused on a main idea.
Paragraphs are not always indented; it depends on the writing format. They vary in length from short to long. They do not always have a topic sentence; some writers organize their thoughts and paragraphs well without topic sentences.
Hope this helps! :)