Based on Current Research,what Would Be a Correct Response to the Notion

Based on current research,what would be a correct response to the notion that most people who suffer from mental illness should be institutionalized in order to reduce gun violence?

A) This is a change that should have been done a long time ago.
B) There is a direct link between violent crime and mental illness,so this would help reduce gun violence.
C) Researchers have not been able to determine if there is a link between violent crime and mental illness.Even so,every little bit helps.
D) The use of alcohol or drugs,brain damage,and a history of previous violence are all better predictors of violent crime than mental illness.