[The Stolen Laptop] Ricardo Told Ashley That Bob Stole Her

[The Stolen Laptop] Ricardo told Ashley that Bob stole her laptop computer from her car. The next day, Ashley confronted Bob and slapped him for stealing her laptop. Bob had Ashley arrested for slapping him, and the local district attorney prepared to prosecute Ashley on behalf of the state. Ashley sued Bob for damages to the laptop and for maliciously having her arrested. Bob also sued Ricardo for defamation, claiming Ricardo lied to Ashley about Bob stealing the laptop.
-Bob's action against Ricardo for defamation involves which types of law?

A) Criminal law and public law
B) Civil law and public law
C) Insider law and public law
D) Civil law and private law
E) Administrative law and public law