17 A common denominator amongst the perpetrators of school shootings is that they were bullied continually at school.
(A) Bullying, as well as shootings, is commonly seen in schools.
(B) People who committed crimes are mostly opposed to school shootings.
(C) Anti-social behavior such as school shooting is a serious crime in all societies.
(D) Campus shooting incidents often result from long-term exposure to bullying in school.