Which of the Following Characteristics Describes Stimulants as a Controlled

Which of the following characteristics describes stimulants as a controlled substance?

A) Younger individuals who use stimulants for a euphoric effect often go on to experiment with other drugs of abuse.
B) Users tend to rely on stimulants to feel stronger, more decisive and self-possessed.
C) Stimulants are usually administered by injection or taken orally.
D) Heavy use could result in psychological dependence.
E) Tolerance develops from heavy use.
F) All of the above.