Final answer:
A sedative drug should produce a mild state of central nervous system depression.
Step-by-step explanation:
A sedative drug should produce a mild state of central nervous system depression (option 4). Depressants are drugs that tend to suppress central nervous system activity, causing relaxation, reduced inhibitions, and sometimes sleepiness. They work by affecting the neurotransmitter system, particularly the gamma-Aminobutyric acid (GABA) system which has a quieting effect on the brain