B. They brought needed supplies into the state.
The systematic study of human population is called, demography.
The correct answer is no significan effects on behavior. Subliminal messages are stimuli that we recieve unconciously. Even though they do not produce an immediate behavioral reaction, over the course of time they can have an impact on our thinking process.
Socrates' statement means that he preferred to die rather than live under the rules and conditions of others, and not be able to investigate.
