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What is the proof for this expression?

This is a major archaeological site that was once a regional center to the mayan empire in ancient mesoamerica.

What is the american psychological association’s ethical principle of psychologists and code of conduct based upon? a. the work of a dozen world-renowned philosophers and ethical savants. b. the feedback of thousands of psychologists and their ethical struggles. c. the regulatory power and authority of the united states constitution. d. the hippocratic rules and guidelines of medical practitioners and surgeons. select the best answer from the choices provided a b c

An individual who is highly motivated to improve his or her economic and social standing would likely feel most frustrated in what kind of system? a. caste b bourgeoisie c. class d. patrilineal