what does it mean when a teachers adds a “excerpts in isolation” comment

Which of the following sentences refers to a conflict between characters in "two kinds"?

In twelve years a slave, when the passengers on the ship learn robert has smallpox, what is their reaction? “panic-stricken” “indifferent” “relieved” “oppressed”

How are the two arguments made in the passages different? a. the first passage claims that pets in class will children with health problems; the second passage says pets will make some health problems worse. b. the first passage claims that students’ nervousness will decrease around pets; the second says that students’ nervousness will increase around pets. c. the first passage claims that pets will make the teacher’s work easier by keeping students busy; the second passage says pets will make the teacher’s work harder. d. the first passage claims that pets in school will be good for kids’ mental health; the second passage says pets will be bad for kids’ mental health.