Which of the Following Best Describes Someone Using a Drug

Which of the following best describes someone using a drug instrumentally?

A) Bob inhaled fumes from the tube of glue in order to feel euphoric.
B) Juan took some aspirin to reduce his headache pain.
C) Jeff injected heroin to feel euphoric and to reduce feelings of heroin withdrawal.
D) Susan consumed cough syrup in order to experience hallucinations.