In the Experiment in Which College Students Breathed Air with Increased

Multiple Choice

In the experiment in which college students breathed air with increased amounts of carbon dioxide through a mask, the students found it much MORE stressful if they

A) were surprised by the trials that contained the increased amount of carbon dioxide.
B) were told which trial would contain an increased amount of carbon dioxide.
C) could control the amount of carbon dioxide entering the mask.
D) experienced repeated trials of increased amounts of carbon dioxide that were each announced before occurring.