Which of the Following Hypotheses Was Proposed in the Textbook

Multiple Choice

Which of the following hypotheses was proposed in the textbook as having been a contributor to the 1999 massacre at Columbine High School?

A) The killers frequently played violent video games.
B) The killers felt rejected by the more popular students at school.
C) The killers were high in power and therefore had reduced inhibitions.
D) The killers frequently played violent video games, and they felt rejected by the more popular students at school.