Which of the Following Is not a Determination That Can

Which of the following is not a determination that can be made from cartridge cases?

A) Marks made on the cartridge case as it is loaded into the chamber for firing.
B) A pin impression made on the base of the cartridge case which is caused by the firing of the weapon.
C) Striations made when expanding gases force the cartridge case against the chamber wall and marks left by the same gases when they force the cartridge case back against the breach.
D) Bullet residue from the fired bullet that is "shaved" off as it exits the gun barrel.