The most complete definition of a civilization is
a. any culture that practices art and religion.
b. the gathering of humans in farms, settlements, and villages.
c. a social structure based on economic power.
d. a complex culture in which a large number of humans share several common elements.

Asenator and house representative do not

Segregation or discriminatory practices that occur even when there is no explicit legal enforcement

Martha participates in a research study in order to receive extra credit for her psychology class. when she arrives in the research office she is given a can of what looks and tastes like beer, but which actually contains no alcohol. in the adjoining room martha's classmate karen is also participating in the study. karen receives a can of alcoholic beer. if the experiment was designed to test the effects of alcohol on concentration, then who is exposed to the independent variable?