HELP Stacy finds a gun at a crime scene. Which part of the gun should she never touch? Stacy knows never to touch the
with her hands or any other object so she does not accidentally discharge the weapon.

The trigger

Explanation:

pure substance: iron,copper

impure substance: water,charcoal

specific gravity is the density of a substance divided by the density of water. since (at standard temperature and pressure) water has a density of 1 gram/cm3, and since all of the units cancel, specific gravity is usually very close to the same value as density

so "c" is the answer

plz give brainliest