Who is responsible for educating and training users and information systems specialists about security, keeping management aware of security threats and breakdowns, and maintaining the tools and policies chosen to implement security?

A$.$ Local law enforcement agency $($LLEA$)$

B$.$ Chief data officer $($CDO$)$

C$.$ Chief executive officer $($CEO$)$

D$.$ Chief security officer $($CSO$)$

E$.$ Chief information officer $($CIO$)$