It Is 1951, and You Are Required to Participate in a Perception

It is 1951, and you are required to participate in a perception experiment. You join seven others seated in a room. You are shown a 10-inch test line and must choose the line that matches it in length from a choice of three lines. The experimenter, Solomon Asch, is studying __________

A) bystander apathy.
B) social loafing.
C) groupthink.
D) conformity.