If you are a student who lives in Tennessee or Wisconsin, why is it more difficult for you to vote than in other states?

a. You are required to vote by mail.
b. You are not allowed to use your campus identification card as a voter identification card.
c. You are required to present two forms of valid identification before voting

The use of embargoes and boycotts rather than military force to compel compliance is referred to as

a. economic sanctions. b. détente. c. foreign activism. d. enlargement. e. containment.

Suppose you do find an extraneous variable that could have great influence on your results, beyond the influence of the independent variable. You could increase the experiment's sensitivity by

a. studying that variable first. b. exposing half of your participants to the independent variable, and half to the extraneous variable, and comparing the performance of the two groups. c. incorporating that extraneous variable as a second independent variable. d. randomly assigning participants to experience either the independent variable or the extraneous variable.