Which line from "Land for Free" best supports the claim that Johann wants to impress Hans? *Johann raced down and replaced the marker with the one his father had given him.
*Johann pulled himself up to his full height and said, “Papa, I will do my best.”
*Johann pushed the worry from his mind that they had come all this way for nothing.
*johann and the mare ran on and on across the flatlands, then picked their way carefully over ridges.

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?