Select all that
which are accurate statements about how eleanor roosevelt changed the traditional role of first lady?

a. she held press conferences.

b. she checked up on government projects.

c. she hosted white house tours.

d. she told the president what the people were thinking.

e. she attended the democratic national convention with her husband.

f. she wrote books, and for newspapers and magazines.

g. she became a champion for underdogs.

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?