People in Your Class Fit into One of Two Groups

Multiple Choice

People in your class fit into one of two groups. The "Blues" are often depressed. The "Reds" are never depressed. The two groups are otherwise the same. You would expect that

A) the Blues have lower serotonin and are more likely to act aggressively.
B) the Reds have higher serotonin and are more likely to act aggressively.
C) the Blues have higher serotonin and are less likely to act aggressively.
D) the Reds have lower serotonin and are less likely to act aggressively.