A(n) is a chemical substance used to treat, prevent, or diagnose a disease or alter one or more functions of the body.

A(n) DRUG is a chemical substance used to treat, prevent, or diagnose a disease or alter one or more functions of the body.

Example: Tylenol (Acetaminophen), Is a Drug that is used to relieve pain, head aches, and reduce fever.

Hope It Helped. :)

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