In addition to comparing ammunition components to firearms, firearm examiners conduct other examinations that usually include which of the following:

A Testing firearms to determine if they function properly.
B Determine the manufacturer or manufacturers of firearms that may have fired a particular bullet or cartridge case.
C All are correct
D Examine clothing and other items for gunshot residues and/or shot patterns in an attempt to determine a muzzle-to-garment distance.
E Determine caliber and manufacturer of ammunition components. Including the examination of various shotshell components.