In a circuit, what should the wire be crafted from? A. An insulator, such as plastic
B. An insulator, such as rubber
C. An insulator, such as glass
D. An conductor, such as copper

a and c

c is 100% but i am confused in a

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.