The longest a person has lived, among well-documented cases, is ______

Darlene has just discovered that she made the dean's list, and she's in ecstasy-singing and dancing down the corridor. Which area of the brain is directing her behavior?

a. hypothalamus b. thalamus c. cerebellum d. midbrain

Caffeine, nicotine, amphetamines, and cocaine are members of a class of drugs known as ________

a. analgesics b. stimulants c. hallucinogens d. depressants