Answer:
C.
A drug is any substance that alters the normal functioning of the body.
Step-by-step explanation:
a drug case any substance other than the nutrients essential for body changes the normal functioning of the body it may be fizzy physiological or biological which is temporary a drug is used in the diagnosis treatment or prevention of a disease to relieve the discomfort and drug producing a state to release the discount for a drug producing state casual when used in continuation or an excessively causes edition known as drug abuse