Which of the Following Characteristics Describes Barbiturates

Which of the following characteristics describes barbiturates?

A) They are used by both physicians and veterinarians to induce sedation and sleep.
B) Larger doses cause sleep 20 to 60 minutes after oral administration.
C) Some individuals may experience a sense of excitement before sedation takes effect.
D) Barbiturates are classified as ultra-short, short, intermediate, and long-acting.
E) All of the above.
F) None of the above.