Trevor heard a burglar entering through a living room window.He grinned as he picked up his gun. Crouching behind the sofa in his darkened home,he ambushed and killed the intruder with several well placed shots.He then added another notch in his trusty side-arm.Trevor most probably:____________

a. has exercised his constitutional right of self-defense.
b. has acted legally,because the shooting took place inside his home.
c. has acted legally if,but only if,the burglar was armed with a gun.
d. is guilty of a homicide,or at least voluntary manslaughter.