What is a feudal system??

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?

One result of recent migration trends is that the workforce in europe has become

The united states constitution is a finely crafted document that was written to last, for the sake of a. currency b. preamble c. ordainment d. posterity