Crystal meth refers to a. methamphetamine crystals, which may be smoked. b. the "high" experience after injecting methamphetamine. c. methamphetamine imported from Colombia. d. methamphetamine capsules

Option A.

Explanation:

Crystal meth is a type of methamphetamine drug that is in form of glass or shiny bluish rocks. It is a highly addictive stimulants that affect the Central nervous system. It is used to treat sleep disorder and attention deficit hyperactivity disorder. The drug increases the dopamine level in the brain. Dopamine is a natural chemical that is involved in body movement, motivation and behaviors. It can be use by smoking or swallowing or snorting.