Bill Is a Subject in an Experiment Designed to Imitate

Multiple Choice

Bill is a subject in an experiment designed to imitate cheering at an athletic event and is asked to make as much noise as he can by cheering and clapping. Bill will probably make the LEAST noise if ​

A) he believes he is in a group of people all making noise at the same time.
B) he is in a group of people all making noise at the same time.
C) he believes he is the only person making noise.
D) he is the only person making noise.