A(0) is a fracture that does not break through the skin; it is also called a closed fracture. HE O A. stress fracture O B. simple fracture b O C. Achilles fracture O D. complex fracture​

firearm identification is the process of analyzing the bullets and cartridge cases left at a crime scene to determine if they came from a particular firearm. marks on the bullets and cartridges may be common to every firearm of that type. these are called class characteristics.