Which of the Following Is True of Multiple Homicides

Which of the following is true of multiple homicides?

A) Unlike serial killers, mass murderers usually select a certain type of victim who fulfills a role in the killer's fantasies.
B) Few mass murders are solved by law enforcement; the typical assailant escapes from the location of the crime, commits suicide, or surrenders to police.
C) Spree killers prefer to kill with "hands-on" methods such as strangulation and stabbing, rather than with guns, which are the preferred weapons of mass murderers.
D) The majority of mass murderers do not attack strangers at random; in almost 80% of studied mass murders, the assailant was related to or well acquainted with the victims.