How did mesopotamia's proto-socialist government contribute to the specialization of labor and the overall success of the civilization?

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

The double-blind procedure is most for a.random assignment b.the placebo effect c.operational definitions replication d. standard deviations

The biopsychosocial perspective is best described as focused on the subconscious mind. based more on genetics than environment in explaining human behavior. a complete approach to explaining human behavior. the first major perspective in psychology. a one-dimensional approach to explaining human behavior.