Answer:
The right option is "the shooters history of being bullied"
Explanation:
People with a history of being bullied turns out to be bullies or portray a high level of violent behaviors. There have been studies that shows a correlation between playing violent video games and violence. There have also been studies that suggest that people who have a history of being bullied will grow up being bullies and displaying several violent conducts.
Movement.... i think there is a theory to it ....
Answer:
The bombing was probably mentioned in the film because it was a recent tragic that took place, that could still be affecting the characters or the people around them.
Explanation: