If Manslaughter Does Not Involve the Intent to Kill, Why

Multiple Choice

If manslaughter does not involve the intent to kill, why is it a felony offense?

A) it's not
B) because the offender should have known that his or her behavior could result in the death of another person
C) because the offender had the requisite mens rea to commit premeditated murder
D) because the offender did not meet criteria for an insanity defense