Positive or negative judgments made about others on the basis of their group membership is ______.

Major advertisements address audiences as ______.

A. citizens B. consumers C. workers D. neighbors

A system of reproducing sound visually, known as _____________ sound, in which audio waves transformed into electric impulses produce a pattern printed on film and read by a photoelectric cell.  The projector can actually "see" the sound in order to reproduce it.

Fill in the blank(s) with the appropriate word(s).