How well were harriet tubmans nursing efforts recognized by the union army? evidence?

The most effective way to provide children with safety messages is to

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?

What did economist john maynard keynes believe about deficit spending?