Thresholds of Violence Which of the following identifies the central idea of the text?
A. School shootings are primarily carried out by very disturbed individuals who have suffered abuse.
B. By knowing the trends of school shootings, it will be easier to anticipate them and prevent them in the future.
C. Some young men who don't suffer from psychosis feel compelled to follow the pattern set by earlier mentally-ill school shooters.
D. Young men who are fascinated with school shootings, but not disturbed, are more dangerous than psychopaths and need to be punished more seriously.

Read the excerpt from the dark game: true spy stories from invisible ink to cia moles. yet, by the time robert e. lee surrendered to ulysses grant at appomattox, virginia, some four years later, about 620,000 soldiers had died on the battlefields, more than american battle deaths in all other wars from the revolution through the vietnam war. what is the author’s primary purpose for including this detail? to inform readers about the differences between three military conflicts to persuade readers of the seriousness of the american civil war to entertain readers with tales from behind the lines of battle to encourage readers to visit battlegrounds in appomattox, virginia