Bill's math professor is late to every lecture period. However, the professor takes attendance and requires that students be in the lecture hall and seated before the lecture begins. Bill has determined that this display of power over the students has to do with which area of nonverbal behavior?

answer; i believe the correct answer is (4) flip a coin as each participant arrives,heads indicates assignment to the first group: tails indicates assignment to the second group;

answer; the president uses mass media to gain support for policies;

answer; pentagon papers, vietnam draft-resistor, james dean, american revolution;

answer; mental health prevention programs;