Yes, it is better to sacrifice one for the life of all
I don't know for problem 4 because we were not given the poems. However, problem 7 is the last option and problem 9 is the second option.
D, summary of information. A discovery is not accurate, because this is a research paper, meaning you are researching something that has already happened. B isn't correct, because recommendations are generally only used for persuasive writing. C isn't correct, because a deeper question in the ending wouldn't make sense, as you want to cover everything in the body. D is your correct choice, since you always want to summarize information at the end of a research paper.
1) D. It compares the number of New York commuters to an insect invasion.
2) C. It demonstrates, in the speaker's view, that Loeb was foolishly obsessed with the crime.
3) C. “. . . a drowsy afternoon in the great rustling oaken silence of the reading room of the Public Library, with the book elevator (like an old water wheel) spewing out books onto the trays.”
4) A. bony
I took the test and got %100. Hope I help. :)